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Increase of CO2 since pre-industrial times 1800 - Oct 2011 http://t.co/T010lq3D #ppm #carbon #globalwarming #climate #change #green #eco
– Josef Biesenberger (jbiesenberger) http://twitter.com/jbiesenberger/status/125488698904150016
is our current heat wave a symptom of global warming?
Here’s what most scientists say is certain:
The Earth is warming, by 1.4-degrees Fahrenheit since 1920
The ice caps are melting and sea levels are rising
10 of the last 12 years were the warmest since 1850
The first six months of 2006 were the hottest since they started keeping records in 1890.
"This heat wave and other extreme events we've seen in recent years are completely consistent with what we expect to become more common as a result of global warming, even though we can't be definitive on any single event,” says Jay Gulledge with Pew Climate Change.
The army is beginning to measure its carbon footprint, as part of a broader emphasis on the costs of climate change.
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