对土地水源的竞争越来越激烈
文章来源:未知 文章作者:enread 发布时间:2016-03-07 05:58 字体: [ ]  进入论坛
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As strategies for energy security, investment opportunities and energy policies prompt ever-growing production and consumption of biofuels like bioethanol and biodiesel, land and water that could otherwise be used for food production increasingly are used to produce crops for fuel. About 4 percent of the world's agricultural land and 3 to 4 percent of its fresh water are now used for growing biofuels, according to a new study published March 3, 2016 in the Nature journal Scientific Reports. About one-third of the malnourished people in the world, the findings suggest, could be fed by using these resources for food production.
 
With the world's population at about 7.4 billion people, and projected to grow to about 9 billion by the middle of the century, the need for food and fuel could increasingly be at odds1.
 
"We are investigating and evaluating the affects of biofuels on food security - the food-energy nexus2 - and its link with the global appropriation3 of land and water," said Paolo D'Odorico, an environmental sciences professor at the University of Virginia who co-wrote the paper with colleagues in Italy. "The land and water resources claimed by biofuel production have been poorly quantified, and we are trying to gain better understanding to help inform public policy."
 
D'Odorico said that if biofuel production for transportation were to be increased to 10 percent of the total fuel used by the transportation sector4 - as is projected to occur based on recent policy and business patterns that encourage renewable energy production - the planet could meet the food needs of only about 6.7 billion people.
 
"We are looking at a food deficit5 for about 700 million people with respect to our current world population," D'Odorico said. "It will only get worse as the population grows."


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1 odds n5czT     
n.让步,机率,可能性,比率;胜败优劣之别
参考例句:
  • The odds are 5 to 1 that she will win.她获胜的机会是五比一。
  • Do you know the odds of winning the lottery once?你知道赢得一次彩票的几率多大吗?
2 nexus vvHyq     
n.联系;关系
参考例句:
  • Shared ambition is the vital nexus between them.共同的志向是把他们联结在一起的重要纽带。
  • Either way,the nexus between the consumer and consumer prices is important.无论那个方面,消费者与消费价格之间的关系是至关重要的。
3 appropriation ON7ys     
n.拨款,批准支出
参考例句:
  • Our government made an appropriation for the project.我们的政府为那个工程拨出一笔款项。
  • The council could note an annual appropriation for this service.议会可以为这项服务表决给他一笔常年经费。
4 sector yjczYn     
n.部门,部分;防御地段,防区;扇形
参考例句:
  • The export sector will aid the economic recovery. 出口产业将促进经济复苏。
  • The enemy have attacked the British sector.敌人已进攻英国防区。
5 deficit tmAzu     
n.亏空,亏损;赤字,逆差
参考例句:
  • The directors have reported a deficit of 2.5 million dollars.董事们报告赤字为250万美元。
  • We have a great deficit this year.我们今年有很大亏损。
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