Did early hunters cause climate change? - environment - 29 May 2010 - New Scientist
IT'S not just for the last century that humans have been messing up the climate. It may have been going on for thousands of years.
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.
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1 comment:
But just the other day, as I posted, someone said Mammoth farts kept the earth warm.
So how could hunting them to extinction do the same thing? These Warmers need to compare notes more often.
Oh, that's right--they destroyed all their notes after getting FOIA requests. Never mind.
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