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  3. Even the most uninformed student of climate change could tell you that the solution to global warming is to alleviate global gre

Even the most uninformed student of climate change could tell you that the solution to global warming is to alleviate global gre

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问题     Even the most uninformed student of climate change could tell you that the solution to global warming is to alleviate global greenhouse gas emissions, and fast. But the problem is that the sheer amount of greenhouse gases we’ve already pumped into the atmosphere has irreversibly bound us to a certain amount of warming over the next several decades. No matter what we do, we’ll have to adapt to it.
    【R1】______Already precipitation patterns seem to be changing, making some drier areas—like the arid American southwest—even drier, and rainy regions even wetter. As warmer temperatures creep northward, so do insects and other pests that are adapted to the heat. The results can be distressing. The tiny mountain pine beetle, which infests pine trees in the Rocky Mountain region, used to be controlled by freezing winters. But as temperatures have warmed over the past decade, the mountain pine beetle’s territory has spread, destroying millions of acres of Canadian pines.
    【R2】______Generations of American conservationists have fought to preserve wildlife and to keep nature pristine in the face of a growing population and pollution. To a remarkable extent, they’ve succeeded—almost 16% of the entire landmass of the U. S. is protected, and the Endangered Species Act has helped save countless animals from extinction.
    【R3】______What good is a wildlife reserve if the protected animals can’t live there, because climate change pushes them out? What difference does it make to defend trees from logging, if global warming will allow a new pest to destroy whole forests?
    【R4】______ Last week the Lincoln Institute of Land Policy brought together conservation leaders from around the U. S. to discuss how to cope with warming, trying to work out a new framework for the biggest challenge facing conservation.
    【R5】______ So too is the scale required to properly adapt to climate change, which will almost certainly continue for decades into the future. "Climate change will affect agriculture, water resources, forestry, transportation, waste management, energy generation, national security, immigration patterns, fisheries, food security, you name it," said Lara Hansen. "We need to change the way we allocate resources, plan economies and protect livelihoods. "
    That means that the way we’ve been carrying out conservation—picking the right land spaces and playing goalie—won’t work anymore, as climate change keeps moving the target. Regardless of what we do, the changes will be coming fast. We need to begin cutting our carbon immediately, but we need to adapt now as well. The world is changing because of us; to save what’s left, we’ll have to change too.
[A]But global warming threatens to change all that, by altering the very foundation on which the conservation movement was built.
[B]Global warming was already having "profound effects" in the American West, and that the future would bring increased drought, heat waves, rainstorms, extinctions and more.
[C]That means climate change isn’t a problem for tomorrow; the effects are happening now.
[D]The conference was fruitful, if a bit depressing. What’s clear is that the sheer speed of the changes already taking place due to warming—like the mountain pine beetle infestation— are catching us off guard.
[E]Conservationists will have to work even harder, trying to minimize non climate-related threats to land and species.
[F]The pine beetle infestation is just one example of global warming’s present clanger. It also represents the unique challenges that warming will pose for land conservation managers on the front lines of the battle against it.
[G]The answer is to adapt the way we practice wildlife and land conservation to climate change. There’s a term for this—adaptive management.
【R3】
选项
答案A
解析 在上文中介绍了自然资源保护管理人员的种种努力和取得的成效，[A]中的but语锋一转，指出虽然自然资源保护管理人员取得了很大成功，但是随着全球气候不断变暖，他们的所有努力都有可能自费。因为气候变暖改变了这一切得以存在的基础。作者提出“如果气候变化使得受保护动物根本无法生存，那么野生动物保护又有什么用?如果全球变暖使得新的虫害肆虐整个森林，那么保护树木免遭砍伐又能起什么作用?”故[A]符合语境。
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