翻译题 Each of us requires about 50 quarts per day fro drinking, bathing, cooking and other basic needs. At present, 1.1 billion people lack access to clean drinking water and more than 2.4 billion lack adequate sanitation. "Unless we take swift and decisive action," says U.N. Secretary-General Kofi Annan, "by 2025, two-thirds of the world''s population may be living in countries that face serious water shortage." The answer is to get smart about how we use water. Agriculture accounts for about two-thirds of the fresh water consumed in the world. A report prepared for the summit calls for more efficient irrigation techniques and more planting of crop varieties that require less water and better monitoring of growing conditions. Improving water-delivery systems would also help, reducing the amount that is lost on the way to the people who use it.