首页
登录
职称英语
"Usually when we walk through the rain forest we hear a soft sound from all
"Usually when we walk through the rain forest we hear a soft sound from all
游客
2024-04-29
33
管理
问题
"Usually when we walk through the rain forest we hear a soft sound from all the moist leaves and organic debris on the forest floor," says ecologist Daniel Nepstad. "Now we increasingly get rustle and crunch. That’s the sound of a dying forest. "
Predictions of the collapse of the tropical rain forests have been around for years. Yet until recently the worst forecasts were almost exclusively linked to direct human activity, such as clear-cutting and burning for pastures or farms. Left alone, it was assumed, the world’s rain forests would not only flourish but might even rescue us from disaster by absorbing the excess carbon dioxide and other planet-warming greenhouse gases. Now it turns out that may be wishful thinking. Some scientists believe that the rise in carbon levels means that the Amazon and other rain forests in Asia and Africa may go from being assets in the battle against rising temperatures to liabilities. Amazon plants, for instance, hold more than 100 billion metric tons of carbon, equal to 15 years of tailpipe and chimney emissions. If the collapse of the rain forests speeds up dramatically, it could eventually release 3.5-5 billion metric tons of carbon into the atmosphere each year—making forests the leading source of greenhouse gases.
Uncommonly severe droughts brought on by global climate changes have led to forest-eating wildfires from Australia to Indonesia, but nowhere more acutely than in the Amazon. Some experts say that the rain forest is already at the brink of collapse.
Extreme weather and reckless development are plotting against the rain forest in ways that scientists have never seen. Trees need more water as temperatures rise, but the prolonged droughts have robbed them of moisture, making whole forests easily cleared of trees and turned into farmland. The picture worsens with each round of El Nino, the unusually warm currents in the Pacific Ocean that drive up temperatures and invariably presage(预示)droughts and fires in the rain forest. Runaway fires pour even more carbon into the air, which increases temperatures, starting the whole vicious cycle all over again.
More than paradise lost, a perishing rain forest could trigger a domino effect—sending winds and rains kilometers off course and loading the skies with even greater levels of greenhouse gases—that will be felt far beyond the Amazon basin. In a sense, we are already getting a glimpse of what’s to come. Each burning season in the Amazon, fires deliberately set by frontier settlers and developers hurl up almost half a billion metric tons of carbon a year, placing Brazil among the top five contributors to greenhouse gases in the world. [br] What makes Brazil one of the world’s top five contributors to greenhouse gases?
选项
A、The domino effect triggered by the perishing rain forests.
B、Its practice of burning forests for settlement and development.
C、The changed patterns of winds and rains in the Amazon area.
D、Its inability to curb the carbon emissions from industries.
答案
B
解析
事实细节题。最后一段末句提到,在亚马逊的每个燃烧季节,拓荒者和开发者蓄意点燃的大火一年向空中排放将近5亿公吨的碳,使巴西成为导致温室气体的前五个因素之一。由此可知,为拓荒和开发进行的焚烧行为使巴西成为导致温室气体的前五个因素之一,故答案为B)。
转载请注明原文地址:https://tihaiku.com/zcyy/3577079.html
相关试题推荐
"Usuallywhenwewalkthroughtherainforestwehearasoftsoundfromall
"Usuallywhenwewalkthroughtherainforestwehearasoftsoundfromall
"Usuallywhenwewalkthroughtherainforestwehearasoftsoundfromall
Inmostculturesthroughouttheworld,thereisanexpectationthatwhenap
Inmostculturesthroughouttheworld,thereisanexpectationthatwhenap
Inmostculturesthroughouttheworld,thereisanexpectationthatwhenap
Inmostculturesthroughouttheworld,thereisanexpectationthatwhenap
Economistsusuallystudymarkets.Now,twoAmericanshavewontheNobelPriz
Economistsusuallystudymarkets.Now,twoAmericanshavewontheNobelPriz
Economistsusuallystudymarkets.Now,twoAmericanshavewontheNobelPriz
随机试题
Everybodyhasanopinionabouttelecommuting(远程办公)."Itwon’tworkinmostj
在问卷设计的过程中,应该注意的问题有()。A.问卷设计的问题要紧扣主题,问题
胸腹手术的体位是A.仰卧位B.截石位C.俯卧位D.侧卧位E.膝胸位
下列( )属于发展转型类的指标。A.公众金融教育 B.合规执行 C.业务及
在寿险、健康险和人身意外伤害险中,有几类险种在2013年5月的保险赔付支
治疗药物浓度监测的标本采集时间一般选择在A.任一次用药后1个半寿期时B.药物消除
通过组织招标,甲方与施工企业乙方于2013年5月10日签订了合同协议书。合同条款
选择下列哪一种方式还款是利息逐月递减、本金逐月递增?()A:等额本息还款法B:
抽查明细账上的一般费用样本,检查其支持性文件,这一审计程序与一般费用最相关的认定
装配式建筑施工时,同一厂家()生产的材料、部品,用于()施工且属于同
最新回复
(
0
)