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1) Ten billion
Author
Language
English
Description
"Just 10,000 years ago, there were only one million humans on Earth. By 1800, just over two hundred years ago, there were one billion of us. By 1960, there were three billion. There are now over seven billion of us. By 2050, there will be at least nine billion other people--and, sometime near the end of this century, there will be at least ten billion of us. There is simply no known way to provide this many people with clothes, food, and fresh water....
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