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mayingjiu

木虫 (正式写手)

[交流] 【share】Water map shows billions at risk of 'water insecurity'

By Richard Black Environment correspondent, BBC News



About 80% of the world's population lives in areas where the fresh water supply is not secure, according to a new global analysis.

Researchers compiled a composite index of "water threats" that includes issues such as scarcity and pollution.

The most severe threat category encompasses 3.4 billion people.

Writing in the journal Nature, they say that in western countries, conserving water for people through reservoirs and dams works for people, but not nature.

They urge developing countries not to follow the same path.

The analysis is a global snapshot, and the research team suggests more people are likely to encounter more severe stress on their water supply in the coming decades, as the climate changes and the human population continues to grow.

They have taken data on a variety of different threats, used models of threats where data is scarce, and used expert assessment to combine the various individual threats into a composite index.

The result is a map that plots the composite threat to human water security and to biodiversity in squares 50km by 50km (30 miles by 30 miles) across the world.

Changing pictures

"What we've done is to take a very dispassionate look at the facts on the ground - what is going on with respect to humanity's water security and what the infrastructure that's been thrown at this problem does to the natural world," said study leader Charles Vorosmarty from the City College of New York.

"What we're able to outline is a planet-wide pattern of threat, despite the trillions of dollars worth of engineering palliatives that have totally reconfigured the threat landscape."

Those "trillions of dollars" are represented by the dams, canals, aqueducts, and pipelines that have been used throughout the developed world to safeguard drinking water supplies.

Their impact on the global picture is striking.

[ Last edited by 三更雨~ on 2010-9-30 at 09:53 ]
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去日留痕

至尊木虫 (文坛精英)

小小木虫虫

优秀版主


小木虫(沙发+1,金币+0.5):恭喜抢个沙发,再给个红包
wen ti hen yan zhong
世间最珍贵的不是“得不到”和“已失去”,而是现在可把握的幸福....
2楼2010-09-30 09:43:25
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飞的猪

铁杆木虫 (文坛精英)

猪家族——飞的猪


小木虫(金币+0.2):抢了个小板凳,给个红包
zhufu  China
我要飞得更高......
3楼2010-09-30 09:45:51
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xuanxuankaoyan

至尊木虫 (知名作家)

it is really threating to hear this news.
4楼2010-09-30 11:18:11
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fangye0413

荣誉版主 (文坛精英)

快乐家族之水

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one half
我喜欢“在路上”的感觉。
5楼2010-09-30 13:50:29
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maomao3323

木虫 (著名写手)

聪聪家族之匆匆毛毛

The pollution is more and more serious.In some area water under the surface has polluted and can't be used for humanbeings or animals.
In other area, drinking water is rare and very valuable.
It's an irony that most area of the earth is surfaced by water, but that can be drinked.
MJ 一路走好
6楼2010-09-30 14:04:36
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小男生

金虫 (小有名气)

it's said that the development of technology results in the disappearment of human being.how wise it is!
7楼2010-10-01 00:14:25
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