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1、 2022年考研英语冲刺阅读理解专项训练128The first choice is to dig our heads and oil drills deeper into the groundWe can continue searching for tinv and hard to recover oil deposits around the world，supplementing the last few drops with dirtier carbon fuels like coal and heavy oil extracted from tar sandThis is a sh
2、ortterm solution that would push the atmosphere to breaking point and fry the planet.Backed by an army of statisticsRifkin calls this path foolish and suicidal The sane ahernative is hydrogen，the most abundant element in the universe.It ls eVerywhere. Unlike oil，it is not geographically concentrated
3、，and therefore unlikely to precipitate power struggles and violenceHydrogen has been dubbed“the forever fuel“，and harnessing it，Rifkin writes”“would provide humanity with acleanvirtually unlimited source of energy the kind of energy elixir that has Iong eluded alchemists and chemists alike” Hydrogen
4、 has been used as a commercial fuel since the l920s，and the Soviets produced therst liquid hydrogen-powered airplane in the70sThanks to rapid advances in fuel cell technologyRifkin thinks a hydrogen-based energy grid could be put in place in time to prevent a global meltdown durlng the fast approach
5、ing end of the Oil Age In the long view，history is on hydrogens sideThe story of human-harnessed energY ls also the storv of“de-carbonization”the gradual reduction of the amount of carbon we use ln OUr fuel of choice Since the industrial revolution，we have moved from first burning wood，and then on t
6、o coal，and then oil and now to a lesser extent natural gas As we have done s0，the level of destruction we haVe visited on our environment has slowed(satanic clouds of soot no longer hang over New York，as they did in the coal age)and this can be explained by the increasing ratio of hydrogen to carbon
7、 in the fuels we use.There is only one molecule of hydrogen for every ten molecules of carbon in woodThere is one for every two in coal，and in oil the ratio inverts，with two hydrogens for every coalIn natural gas there are four hydrogen molecules for every molecule of carbon0ur fuels become cleaner，
8、in other words，as they grow higher in hydrogen contentSo pure hydrogen is，logically，the cleanest alternative422 words 1This passage is mainly about_ Ade-carbonization Bthe oil crisis Chydrogen-a sound alternative to oil Dhydrogen-another commercial fuel 2According to Rifkin，it is wise_ Ato develop h
9、ydrogen powered vehicles Bto recover more oil deposits Cto use coa nstead of oil Dt0 1earn something useful from alchemists 3The Oil Age_ Ais coming to its end Bis fast approaching Cis still in its prime Dis in the balance 4In which of the following is there the lowest level of carbon? ABurning wood BCoal COil DNatural gas 5The fuel becomes cleaner，when_ Athe ratio of carbon to hydrogen in it increases Bthe ratio of hydrogen to carbon in it increases Cthe amount of carbon in it remains constant Dthe amount of hydrogen ill it remains constant
