Global Warming

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Originally Posted by texastig

In 1000 AD, Leaf Ericsson founded colonies on Greenland and present day Newfoundland, which he called Vinland because of the grapes that grew freely then. Many scientists claim the average temperature was 7 degrees warmer then than it is now. The polar bears survived this natural phenomena and will also survive this one.

Thanks,
TT

"The climate of the Earth is always changing. In the past it has altered as a result of natural causes. Nowadays, however, the term climate change is generally used when referring to changes in our climate which have been identified since the early part of the 1900's. The changes we've seen over recent years and those which are predicted over the next 80 years are thought to be mainly as a result of human behaviour rather than due to natural changes in the atmosphere."

Climate Change: Observed impacts on Planet Earth
by Trevor Letcher
http://www.amazon.com/Climate-Change...5984557&sr=1-1

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Earth bears scars of human destruction: astronaut
Irene Klotz – Mon Jul 27, 2009

CAPE CANAVERAL, Florida (Reuters) – A Canadian astronaut aboard the International Space Station said on Sunday it looks like Earth's ice caps have melted a bit since he was last in orbit 12 years ago.

Bob Thirsk, who is two months into a planned six-month stay aboard the station, said he is mostly in awe when he looks out the window, particularly at the sliver of atmosphere wrapped around the planet.

"It's a very thin veil of atmosphere around the Earth that keeps us alive," Thirsk said during an in-flight news conference. "Most of the time when I look out the window I'm in awe. But there are some effects of the human destruction of the Earth as well."

"This is probably just a perception, but I just have the feeling that the glaciers are melting, the snow capping the mountains is less than it was 12 years ago when I saw it last time," Thrisk said. "That saddens me a little bit."

If Thrisk needs a sympathetic ear, he has 12 crewmates with him, at least until Tuesday, when visiting shuttle Endeavour astronauts are scheduled to depart.

http://news.yahoo.com/s/nm/us_space_shuttle

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