Life on Earth will become unsustainable unless population growth is held in check.

地球上的生命将无法延续，除非人口增长得到控制。

《柯林斯英汉双解大词典》

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The world's population has more than tripled during this century, and world output has risen hugely, so you would expect the earth itself to have been affected.

本世纪世界人口增长了两倍多，世界产出也大幅增长，所以你会认为地球本身也受到了影响。

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"Forty-two percent of the earth's population live in areas where malaria transmitting mosquitoes exist.

VOA: special.2009.12.07

"Forty-two percent of the earth's population lives in areas where malaria transmitting mosquitoes exist.

VOA: special.2009.12.22

Early in the 21st century, more than 20 of this assembly's members, home to half the earth's population, will lift themselves from the ranks of low-income nations.

CNN: Text Of Clinton's Remarks To The United Nations

The report says the Earth's population is likely to increase from 6.4 billion people today to 8.9 billion by 2050, with the 50 poorest countries tripling in total numbers to 1.7bn people.

BBC: NEWS | Science/Nature | Slowing population 'lacks funds'

My father and I were disappointed to arrive at the 1965 New York World's Fair after the scoreboard-style lighted display on the Earth's population changed from 2, 999, 999, 999 people to a bit over 3 billion.

CNN: 'The Science Guy' says: 'Save the Earth'