Eight billion? Nine billion? How about 11 billion?No, that's not the number of bedbugs in a typical New York City hotel, but rather some guesstimates on the number of people that will be here on Earth in the year 2050, up from today's nearly seven billion.
How will all these extra people affect climate change?
A new study out today in the Proceedings of the National Academy of Sciences shows how these changes in the world's population growth, along with aging and urbanization, could dramatically affect emissions of greenhouse gases such as carbon dioxide over the next four decades.
The study found that a slowing of population growth – using one of the slower growth estimates from United Nations demographers – could contribute to significantly reducing greenhouse gas emissions.
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