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- 2010-4-5
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发表于 2010-4-5 14:46
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[Homework]SENEWS-2010-04-05
this is the VOA special english development report,the lack of clean drinking water is a major problem worldwide,the world health organisation says more than 1 billion people live in the areas where the renewable water resources are not available,the problem is specially serious in the Aisa and the pacific,a united nation report says the water availibility in the area is the second lowest in the world after African, nearly 300,000 people live in the african lack of safe dringking water,the UN report notes the water used in poor countries are also the the ones ues the most water in angriculture, angriculture uses about 80% of the water in the aisa-pasific area,there's also an increased use for industry,china,indian the triple of the water used between 1992 to 2002,the lack of clean dringking water forces millons of people drinking unsafe water,this leads an increase in diseases like dierie the second leadings cause of death of in children under 5,doughts,pollutions and climate change have created more problems,the goal in2015 is 15% decrease in the number of people without safe drinking water and basic sanitations. scientists,goverments and aid organisations around the world are increasing their efforts to meet these goals,still ,the UN says there's much work to be done,using its yearly world water day obsevence last month ,it called on the world communities to work together to solve the water crisis ,researchers at the math tutits institutive technologe are doing just that ,the ameirican and south reseachers are investigating a new technolog in tranlating sea water into drinking water,the new technologe is called IMconcentration poloresation,the process uses eletricity to help seperate electricly charged soft paticles from water to make it drinkable,the reseachers tested their DC process isolation on a computer chip the signs of posted stand,the chip removed 99% of the sold and other harmful substances from water samples,so far ,the methods purifies only small amounts of water,but the reseachers say it may someday be available as a personel water purification products.
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