考研英语阅读精选：世界人口到10月底将会达到70亿

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考研英语阅读精选：世界人口到10月底将会达到70亿
The world’s population will reach 7 billion at the end of October. Don’t panic

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milestone has taken longer to reach than the one before. The billion after that will take 18 years.
Once upon a time, the passing of population milestones might have been cause for celebration. Now it gives rise to jeremiads. As Hillary Clinton’s science adviser, Nina Fedoroff, told the BBC in 2009, “There are probably already too many people on the planet.” But the notion of “too many” is more flexible than it seems. The earth could certainly not support 10 billion hunter-gatherers, who used much more land per head than modern farm-fed people do. But it does not have to. The earth might well not be able to support 10 billion people if they had exactly the same impact per person as 7 billion do today. But that does not necessarily spell Malthusian doom, because the impact humans have on the earth and on each other can change.