Làm thử Đề thi thử tốt nghiệp THPT · Tiếng Anh · Đề 091

Question 15. a. Dear Ms. Lan, I hope this email finds you well after your recent trip.
b. I am writing to ask for some advice about applying for the student exchange programme in Japan.
c. Specifically, I would like to know what documents are usually required for the visa application.
d. Thank you very much for your time, and I look forward to hearing from you soon.
e. I have already read the general information on the website, but a few details are still unclear to me.

Question 16. a. Community-based conservation programmes are becoming increasingly popular across Southeast Asia.
b. Local villagers are trained as rangers and paid a fair wage to patrol protected forests.
c. As a result, poaching rates in these areas have dropped sharply in recent years.
d. Unlike traditional conservation, this approach gives nearby communities a direct stake in protecting wildlife.
e. Some critics argue, however, that funding for these programmes remains too unpredictable to guarantee long-term success.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

Walk into some classrooms today and you might find a new kind of assistant sitting quietly beside the teacher: an AI tutor. These programs use artificial intelligence to give each student personalised exercises, instant feedback, and hints tailored to their exact level. Supporters describe them as a patient, tireless helper that never runs out of time for a struggling student, while sceptics worry that something important is lost when a screen replaces a human teacher's attention.

In practice, AI tutors work best on well-defined subjects such as maths and grammar, where a computer can easily check whether an answer is right or wrong. A tool might notice, for example, that a student keeps making the same mistake with fractions and quietly generate five extra practice questions on exactly that skill. Teachers who use these tools say the biggest benefit is the data they provide: instead of guessing which students need extra help, a teacher can see a clear report of who is struggling and with what.

Critics point out that an AI tutor can tell a student an answer is wrong, but it cannot always explain why in a way that truly makes sense to that particular learner. A human teacher notices confusion on a face, adjusts an explanation on the spot, and offers encouragement that a chatbot cannot fully replicate. There are also concerns about privacy, since these tools collect detailed records of how every student performs, and about equity, since not every school can afford the software or the devices it requires.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.

A recent report compiled by a group of environmental scientists has examined how water scarcity is likely to affect river deltas across Southeast Asia over the next thirty years. The findings, published this year, draw on decades of rainfall and river-flow records from national meteorological agencies across the region. The report combines climate models, population data, and records of water use to predict which areas face the greatest risk, and it pays particular attention to the Mekong and Red River deltas in Vietnam.

According to the report, rainfall patterns across the region are becoming less predictable, with longer dry seasons followed by shorter, more intense periods of rain. [I] At the same time, population growth and expanding agriculture are increasing demand for fresh water every year. [II] Upstream dam construction further reduces the amount of water reaching downstream communities during the dry months. [III] Researchers warn that these three pressures, taken together, could reduce the amount of fresh water available per person in the Mekong Delta by nearly a third by 2050. [IV]

The consequences are not evenly spread. Coastal communities that already rely on groundwater are especially vulnerable, since overuse of groundwater can allow salt water to seep into fresh water supplies, a process known as saltwater intrusion. Farmers in low-lying areas have reported that rice fields once considered reliable are now too salty to farm during parts of the year, forcing some families to switch to shrimp farming or leave agriculture altogether.

The report concludes that without significant investment in water storage and more efficient irrigation, several million people in the Mekong Delta could face serious water shortages within a generation. It recommends a combination of solutions, including better coordination between countries that share the Mekong River, smarter irrigation systems that reduce waste, and stronger protection for the wetlands that naturally store water during the wet season. None of these solutions alone, the authors stress, will be enough on its own.

The researchers hope the report will encourage governments in the region to treat water scarcity as an urgent, shared problem rather than a series of separate national issues. They point out that rivers do not respect borders, and that a dam or irrigation project in one country can have consequences for millions of people living far downstream in another. Some officials have already begun discussing a new regional agreement on water sharing, though negotiations are expected to take years.