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And then there's economic water scarcity. "Physical water scarcity really just means that there's not enough actual water to meet all demands. Water is not distributed evenly. You know, areas in the Middle East, in northern China, in northwestern India -- very arid regions -- where there's just not enough water. And so there's just not physical availability." Kumar says action to relieve these problems can be taken on the local, national and regional levels. "In terms of the local level, we could put more investment into water harvesting - into better methods of reusing water that's wasted - treating it to be reused for agriculture or for other industries." On the national level, the Worldwatch Institute recommends that governments develop better water policies which could include fewer or revised agricultural subsidies. "For example, in India, a lot of farmers have subsidies that provide them with the use of electricity for 24 hours without any fees. And so, that leads them to pump water constantly which is really depleting the ground water." Worldwatch says, globally, 70% of what's called "water withdrawals" is for agriculture, 19% for industry and 11% for municipal demands. Some of the countries with very high withdrawals include India and the United States.
此外还有经济型缺水。“自然水短缺就是意味着没有足够的实际水资源来满足所有的需求。水资源并不是平均分布的。你知道的,在中东,中国北方和印度西北部这类非常干旱的地区,没有足够的水资源。所以就没有自然水的可利用性。”库马尔说可以通过对地方、国家甚至区域级范围采取行动来缓解这些问题。“在地方层面,我们可以加大集水投资,找到更好的方法进行废水利用,使其能再次为农业或者其他工业服务。”在国家层面,世界观察研究所建议政府出台更好的水利政策,其可能包括更少的或经修订的农业补贴。“比如,在印度,许多农民享受24小时免费用电的补贴。正因为如此,他们不间断地泵水,简直要将地下水耗尽。”世界观察(研究所)表示,全球范围来看,农业用水占了取水量的70%,工业和市政需求分别占了19%和11%。这些需水量极高的国家包括印度和美国。
责编:刘卓
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