Mr. Engelman says the population（人口） in countries that lack water is growing faster than in other parts of the world . He says population growth in these countries will continue to increase .

　　The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking waters not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera（霍乱）, which are carried in water. Lack of water may also result in more international conflict（冲突）. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect（影响） the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.

　　The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.

　　The report also says long-term （长期的）solutions to the water problem must include controls on population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.

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