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科学美国人60秒:城市发展时代进程-托福听力下载

2017-01-04 12:07:32来源：科学美国人60秒

点击查看>>科学美国人60秒音频：城市发展时代进程

　　科学美国人60秒中英文翻译：城市发展时代进程

　　More than half of the world's 7 billion people live in cities, 54 percent to be specific, or 3.9 billion people.

　　That's according to new figures released by the United Nations on July 10th.

　　Cities in China, India and Nigeria, the world’s first, second and seventh most populous countries, are expected to grow the most by 2050.

　　India alone will add more than 400 million people to its cities, or the equivalent of 20 Mumbais, just in the next three decades.

　　By 2030, New Delhi is likely to have 36 million residents.

　　城市的发展.jpg

　　How these cities in Asia and elsewhere grow and get built will determine how humanity fares in the 21st century.

　　Housing, energy and transportation are all major challenges, whether in sprawling megacities or relatively small towns of a million or so inhabitants.

　　The health and environmental consequences of wasteful infrastructures could be devastating.

　　Cities are now responsible for more than 70 percent of the greenhouse gases causing global warming, which has impacts on everything from growing food to water supplies.

　　And most at risk from sea level rise are all those folks in coastal cities.

　　The future is urban—for better or worse.

　　科学美国人60秒英文文本

　　中文翻译请点击下一页

本文关键字: 科学美国人60秒 科学60秒下载 托福听力

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