改装市区环境以减少co2排放-凯发k8官网

改装市区环境以减少co2排放
文章来源:未知 文章作者:enread 发布时间:2012-04-15 03:19 字体: [ ] 
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imagine a world where the rooftops and pavements of every urban area are resurfaced to increase the reflection of the sun's light rays. well, this is exactly what a group of canadian researchers have simulated in an attempt to measure the potential effects against global warming. in a study published april 13, in iop publishing's journal environmental research letters, researchers from concordia university created this 1 to see what effect a global increase in surface reflectance(反射比) would have on global temperature and our own carbon dioxide (co2) 2.

they estimate that increasing the reflectance -- commonly known as albedo(反射率) -- of every urban area by 0.1 will give a co2 3 between 130 and 150 billion tonnes. this is equivalent to taking every car in the world off the road for 50 years, assuming a single car gives off around 4 tonnes of carbon dioxide a year.

this could also provide huge financial gains: co2 is currently traded at $25 a tonne meaning 4 could be in the range of $3300 and $3800 billion dollars.

albedo is measured on a scale ranging from 0 for a non-reflecting, 5 black surface to 1 for a perfectly white surface. the albedo of all roofs can be increased, on average, by 0.25 and all paved surfaces can be increased by about 0.15. the researchers believe this will increase a city's overall albedo by about 0.10.

researchers have long proposed that changing the albedo of a surface could be an effective way of reducing co2 emissions. a change could effectively cool buildings that would usually retain heat and therefore reduce the use of air-conditioning systems; it could also improve outdoor air quality and offset the warming that the world is currently experiencing.



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1 lzoxm     
n.剧本,脚本;概要
参考例句:
  • but the birth scenario is not completely accurate.然而分娩脚本并非完全准确的。
  • this is a totally different scenario.这是完全不同的剧本。
2 1a87f8769eb755734e056efecb5e2da9     
排放物( emission的名词复数 ); 散发物(尤指气体)
参考例句:
  • most scientists accept that climate change is linked to carbon emissions. 大多数科学家都相信气候变化与排放的含碳气体有关。
  • dangerous emissions radiate from plutonium. 危险的辐射物从钚放散出来。
3 mizx8     
n.分支,补偿;v.抵消,补偿
参考例句:
  • their wage increases would be offset by higher prices.他们增加的工资会被物价上涨所抵消。
  • he put up his prices to offset the increased cost of materials.他提高了售价以补偿材料成本的增加。
4 zjbzgu     
n.存款,储蓄
参考例句:
  • i can't afford the vacation,for it would eat up my savings.我度不起假,那样会把我的积蓄用光的。
  • by this time he had used up all his savings.到这时,他的存款已全部用完。
5 8mzxb     
adv.完美地,无可非议地,彻底地
参考例句:
  • the witnesses were each perfectly certain of what they said.证人们个个对自己所说的话十分肯定。
  • everything that we're doing is all perfectly above board.我们做的每件事情都是光明正大的。
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