Climate Change
Climate Change
Out of context: Reply #60
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- georgesIII-1
getting ridiculous faster than I though
http://www.newscientist.com/artiā¦
Did early hunters cause climate change?"When hunters arrived in North America and drove mammoths and other large mammals to extinction, the methane balance of the atmosphere could have changed as a result, triggering the global cool spell that followed. The large grazing animals would have produced copious amounts of methane, a potent greenhouse gas, from their digestive systems. They vanished about 13,000 years ago"