GRE阅读写作分析--A water warning_GRE写作

GRE阅读写作分析--A water warning

　　As if this were not enough, politicians have added another drainbiofuels. It takes up to 9,100 litres of water to grow the soy for one litre of biodiesel, and up to 4,000 litres for the corn to be transformed into bioethanol. What is meant to alleviate a serious environmental problem is making another, even more serious problem worse. Whatever the scenarios for climate change, we must reduce the consumption of fossil energy. But biofuels from crops specifically planted to be transformed into energy are clearly the wrong answer. I am convinced that, under present conditions and with the way water is being managed, we will run out of water long before we run out of fuel.

　　How to avoid running dry

　　There are solutions. They start in politicsfor example, stopping subsidies for biofuels. Even more important, look for ways to use water in agriculture more efficiently. There is enough land and water to supply more meat to people in emerging economies. Efficient irrigation, for instance, would reduce freshwater withdrawals almost by half.

　　And more can be done at international level. Some crops are better grown in water-rich countries, others grow well with relatively little water. If water had a price , and if farm products could be traded freely and without subsidies across borders, a water-efficient allocation of production would follow.

　　What is business doing? At Nestl, we have brought down freshwater withdrawals for our production from five litres per dollar of sales ten years ago to less than 1.8 litres. We actively participate in the public-policy dialogue on water, and together with other companies we have initiated the UN Global Compact CEO Water Mandate, aiming at a more efficient water use in industry.