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cTopher White spends so much time walking in the forest and thinking about how quicklywe're losing it.The engineer is determined to stop global deforestation.Founder of the SanFrancisco-based non-profit Rainforest Connection,White has developed a small but cleverstrategy:using old cell phones to listen for the sound of destruction.Forests are disappearing worldwide,and fast:an area about half the size of England is losteach year.The Amazon has lost close to one-fifth of its rainforest cover in the last four decades.Forest loss not only harms wildlife,including many species that live nowhere else,but it's also abig contributor to the greenhouse gas emission (that cause climate change."I didn't know any of this when I started,"says White,who began his journey in 2011,whenhe traveled to Indonesian Borneo to help decreasing gibbons(长臂猿).Between 50 and 90 percent of the logging that happens in the world's rainforests is illegal,according to White,yet detecting chainsaws()and other sounds related to that activity can betough,because the air is already filled with the loud unpleasant mixture of sounds from nature.Sohe has developed a system in which he installs a cell phone that stays charged by solar ceils,attaches an extra microphone,and listens.From there,the device can detect the sounds ofchainsaws nearly a mile away.Because it's unfeasible to have people listening to the devices all the time,he added some"old-school data analysis",so that the cell phone's computers can distinguish a chainsaw's soundfrom others in the forest.This way,his device can automatically detect logging activity and send atext alert to authorities who can determine if it's illegal and then stop it.White notes that he's not alone in the fight:Many people and organizations are workingtirelessly to stop forests from disappearing.For instance,local groups are particularly active inforest conservation efforts,White says.So far,his monitoring devices have been used in Cameroon,Ecuador,Peru,and Brazil andwill soon be used in Bolivia.It's not just about listening for logging.The same technology that canpick out the buzz of a chainsaw can pick out the sounds of specific birds,which is why Whtie seesthe forest recordings as a potential science tool.He's urging biologists and ecologists to use hismonitoring system anywhere,whether it's a remote forest or a park in London."The more welearn about these places,"he says,"the easier it'll be to protect them."29.The second paragraph is mainly aboutA.the measures to prevent forest lossB.the causes and effects of forest lossC.the areas that suffer great forest loss D.the urgency about reducing forest loss30.What does the underlined word "unfeasible"in Paragraph 5 most probably mean?A.Impractical.B.Unnecessary.C.PossibleD.Significant.高一英语试题，第5页，共10页