Forests give us shade,quiet and one of t

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问题 Forests give us shade,quiet and one of the larder callenges in the fight against climate change.Even as we humans count on forests to soak up a good share of the carbon dioxide we produce,we are threatening their ability to do so.The climate change we are hastening could one day leave us with forests that emit more carbon than they absorb.Thankfully,there is a way out of this trap-but it involves striking a subtle balance.Helping forests flourish as valuable“carbon sinks”long into the future may require reducing their capacity to absorb carbon now.California is leading the way,as it does on so many climate efforts,in figuring out the details.The state’s proposed Forest Carbon Plan aims to double efforts to thin out young trees and clear brush in parts of the forest.This temporarily lowers carbon-carrying capacity.But the remaining trees draw a greater share of the available moisture,so they grow and thrive,restoring the forest’s capacity to pull carbon from the air.Healthy trees are also better able to fend off insects.The landscape is rendered less easily burnable.Even in the event of a fine,fewer trees are consumed.The need for such planning is increasingly urgent.Already,since 2010,drought and insects have killed over 100 million trees in California,most of them in 2016 alone,and wildfires have burned hundreds of thousands of acres.California plans to treat 35,000 acres of forest a year by 2020,and 60,000 by 2030-financed from the proceeds of the state’s emissions-permit auctions.That’s only a small share of the total acreage that could benefit,about half a million acres in all,so it will be vital to prioritize areas at greatest risk of fire or drought.The strategy also aims to ensure that carbon in woody material removed from the forests is locked away in the form of solid lumber or burned as biofuel in vehicles that would otherwise run on fossil fuels.New research on transportation biofuels is already under way.State governments are well accustomed to managing forests,but traditionally they’ve focused on wildlife,watersheds and opportunities for recreation.Only recently have they come to see the vital part forests will have to play in storing carbon.California’s plan,which is expected to be finalized by the governor next year,should serve as a model.By saying“one of the harder challenges,”the author implies that_______.《》（）A.global climate change may get out of controlB.people may misunderstand global warmingC.extreme weather conditions may ariseD.forests may become a potential threat

选项 A.global climate change may get out of control
B.people may misunderstand global warming
C.extreme weather conditions may arise
D.forests may become a potential threat

答案 D

解析根据题干By saying“one of the harder challenges,”the author implies that_______.定位到原文第一段第一句，但是我们发现第一段只提到了one of the harder challenges，而没有给出harder challenges指什么，也就是没有给出本题的答案，因此我们需要看第一句后面的句子。第一句是中心句，后面的句子是对第一句进行阐述，根据后面的句子的阐述，我们可知尽管我们人类依靠森林来吸收大量的二氧化碳，但是我们造成的气候变化将会使我们的森林最终会释放的碳比吸收的碳还要多。也就是D选项所说的森林可能会成为潜在的威胁。因此答案为D选项。

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Forests give us shade,quiet and one of t

英语二研究生

研究生入学