1. The speaker is talking about the coming global water crisis/water problem.

2. Water is an important part of our daily life, not only for human use, but also for energy, industry, agriculture and animal husbandry.

If you look at the earth, you will notice that more than 75% of our blue planet is water. But the problem is that only 3% of the water is fresh water.

Written record:

Today, according to UNICEF, at least 2.6 billion people lack adequate sanitation facilities, and 1. 1 100 million people live in a period without clean drinking water. No matter where we live, water is an important part of our daily life, not only for human use, but also for energy, industry, agriculture and animal husbandry. Now if you look at the earth, you will notice that more than 75% of our blue planet is water. The problem is that only 3% of the water is fresh water.

Reading and writing. interaction

I. Understanding the text

1. Text organization

1. 1

Paragraph 107- 109. 1-2: We need to actively save water so that scientists have time to find solutions.

Paragraph 107- 109. Water will become the most important and controversial resource in 2 1 century.

Paragraph 107- 109. 8-9: There is a solution, but it takes time.

Paragraph 10: Before scientists find a solution, we need active protection to gain time.

1.2

Water is becoming the most important resource in 2 1 century. Proper use of water is the biggest challenge facing the world. In order to meet the challenge, protection should be given priority; Then follow up the new solution.

2) In order to introduce the problem of water, the author told us what happened one night when he brushed his teeth with his seven-year-old daughter. In doing so, the author tries to lead the reader into a serious topic in a casual way. In addition, it also reminds us that everyone can play a role, even in our daily life, saving water.

3) He quoted the greatest 10 problems listed by the late Nobel Prize winner Richard Smali in the next 50 years.

He wants to show readers how difficult it is for us to find a solution to the water problem.

He repeated what he said at the beginning of the article: the problem of water can be solved, but "scientists need time."

2. Understanding check

2. 1 Focus on the main points

In his speech at the School of Energy and Energy of Rice University in 2003. At the nanotechnology conference, the late Nobel Prize winner Richards Marley emphasized the 10 primary problems in the next 50 years. In his list, energy comes first, followed by water. Now, with the decline of solar energy prices, the dawn of the new energy era is coming. Therefore, water will become the biggest challenge facing mankind.

But the problem of water is very complicated. First of all, unlike coal and oil, water is irreplaceable. Second, water is intertwined with every other sector of society. Third, while water demand is increasing, climate change has aggravated droughts and floods, and water supply is also fluctuating.

There are solutions, such as building water pipelines, hydropower dams and desalination plants. But they can be very expensive. Scientists need time to find an affordable solution to the water problem. Until then, everyone should do their part to save water.

2.2 Digging the details

1) He means that water, like oil, is most likely to become a strategic resource that may trigger geopolitical conflicts.

2) Because solving the problems of energy and water will make other problems easier to deal with. Abundant energy and water resources will increase food production and improve the environment. They will also reduce poverty, disease and so on.

3) It probably means producing energy at low cost.

What he means is that other sectors of society need water. People need water in their daily life. Energy production needs water to cool the power plan. Industry needs water for various purposes. Agriculture needs water for irrigation.

Yes, he did. Because he said that getting fresh water from salt water at a low price would dwarf all other scientific achievements.