首页
登录
职称英语
【B1】 [br] 【B4】 [originaltext] Perched among the highlands of western Cameroon
【B1】 [br] 【B4】 [originaltext] Perched among the highlands of western Cameroon
游客
2023-07-18
22
管理
问题
【B1】 [br] 【B4】
Perched among the highlands of western Cameroon, bordered by green mountains and cliff faces, Lake Nyos is a scene of breathtaking beauty. But the picture cannot be trusted. A detailed study reveals that the lake could release a deadly cloud of carbon dioxide, capable of wiping out entire communities around its shores.
The warning, from a team of scientists, comes nearly 20 years after the lake discharged an estimated 80m cubic metres of CO2 into the atmosphere. Heavier than air, the cloud of gas rolled down, surrounding hillsides and villages. Silent and invisible, it exhausted the air of oxygen, killing hundreds of cattle and claiming the lives of more than 1,700 people up to 26 km away. "It was one of the most mysterious disasters scientists have ever investigated," said George Kling, an ecologist at the University of Michigan.
Researchers called in after the 1986 tragedy discovered that the lake, which sits atop a volcano, contained record levels of carbon dioxide. Gas bubbling up from the Earth’s magma was under such pressure at the bottom of the 200-metre-deep lake that it dissolved until it reached max. A slight shake then released the dissolved gas as a dangerous bubble.
To prevent a recurrence, in 2001 engineers installed a pipe to suck CO2 from the bottom of the lake and release it harmlessly into the air. A pipe was also installed at Lake Monoun, where an outbreak of CO2 killed 37 people in 1984. Dr Kling’s team recommends the urgent installation of a further four pipes in each lake at a rate of one a year. "By 2010, those five pipes would be enough to get the carbon dioxide down to safe levels," he said.
选项
答案
surrounding
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2847699.html
相关试题推荐
[originaltext]Manysufferfromshyness.Inordertogiveotherpeopleacha
[originaltext]Manysufferfromshyness.Inordertogiveotherpeopleacha
[originaltext]M:..,AndwheredoyourecommendIshallstay?What’stheHolida
[originaltext]W:We’dbetterbelookingforsalesonjacketsandunderwear.It’
[originaltext]M:Howdidyourphilosophytestgo?W:Icouldn’tfeelbetterabo
[originaltext]M:Howdidyourphilosophytestgo?W:Icouldn’tfeelbetterabo
[originaltext]M:Howdidyourphilosophytestgo?W:Icouldn’tfeelbetterabo
[originaltext]M:Howdidyourphilosophytestgo?W:Icouldn’tfeelbetterabo
[originaltext]M:Howdidyourphilosophytestgo?W:Icouldn’tfeelbetterabo
[originaltext]WhenyoutakeawalkinanyofthecitiesintheWest,youof
随机试题
Skipthatthirdhelpingofroastbeef,savetheplanetanddoyourheartaf
下列不影响可贷资金供给的是()A.政府财政赤字 B.家庭储蓄 C.央行货币
演出项目风险的类型包括( )A.其他项目运行风险 B.演出安全管理风险 C
排水固结法由排水系统和塑料排水板组成
政府通过制定合适的流通产业政策,适度地为消费者提供需要的商品或服务,就可以实现充
看见路上的垃圾后绕道走开,这种行为是( )。A.强化 B.惩罚 C.逃避条
A.根 B.根茎 C.块茎 D.根及根茎 E.鳞茎丹参的药用部位是
下列选项中,可以开具增值税专用发票的是()。A.房地产中介公司向消费者个人
要求预算部门的收支应以总额列入预算,而不应当只列入收支相抵后净额,这体现了政府预
(2020年真题)下列各项中,通过“营业外收入”科目核算的是()。A.出租无形
最新回复
(
0
)