[下册]Unit Seven课件.pptVIP

《研究生英语精读教程》(第三版下);Unit Seven;A Bet on Planet Earth;stake※ n. bet赌注 ultimate adj. final最终的;One saw pesticide seeping into groundwater; the other saw farm silos* brimming with record harvests. One saw rain forests being decimated*; the other saw people living longer. ［2］Today, these men lead two intellectual schools ... sometimes called the doomsters and the boomsters - that debate whether the world is getting better or going to the dogs.;［3］The ecologist, Paul R. Ehrlich①, 58, has been one of the worlds better-known scientists since publishing The Population Bomb in 1968. More than two million copies were sold. When he is not teaching at Stanford University or studying butterflies, Ehrlich can be found lecturing, collecting an award or appearing on the Today show. He is the pessimist.;［4］The Population Bomb began: “The battle to feed all of humanity is over. In the 1970s hundreds of millions of people are going to starve to death.” Ehrlich wrote that, “nothing can prevent a substantial increase in the world death rate.” In 1974, he predicted that “before 1985 mankind will enter an age of scarcity” in which “the accessible supplies of many key minerals will be nearing depletion*.;［5］The economist, Julian L. Simon①, 59, is a professor at the University of Maryland. His views have helped shape policy in Washington for the past decade, but he has never enjoyed Ehrlich‘s academic success or popular appeal*. He is the optimist.;［6］Simon believes that population growth constitutes not a crisis but a boon* that will ultimately mean a cleaner environment and a healthier humanity. Tomorrows world will be better because it will have more people producing more bright ideas. Progress can go on indefinitely because the planets resources are not finite.; ［7］When Simon wrote about his happy vision of the future in Science magazine in 1980, his article attracted a slew of angry letters. An irate Ehrlich provided the simple arithmetic: the planet‘s resources had to be d