Climate Change Calculus: Why It's Even Worse Than We Feared
Published Jul 24, 2009
From the magazine issue dated Aug 3, 2009
Newsweek Voices - Sharon Begley
Newsweek.com
"Scientists have long known that permafrost, if it melted, would release carbon, exacerbating global warming, which would melt more permafrost, which would add more to global warming, on and on in a feedback loop. But estimates of how much carbon is locked into Arctic permafrost were, it turns out, woefully off."
" 'It's about three times as much as was thought, about 1.6 trillion metric tons, which has surprised a lot of people,' says Edward Schuur of the University of Florida. 'It means the potential for positive feedbacks is greatly increased.' "
"That 1.6 trillion tons is about twice the amount now in the atmosphere. And Schuur's measurements of how quickly CO2 can come out of permafrost, reported in May, were also a surprise: 1 billion to 2 billion tons per year. Cars and light trucks in the U.S. emit about 300 million tons per year."
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Tuesday, July 28, 2009
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What's a Carbon Footprint?
A
carbon footprint is a "measure of the impact human
activities have on the environment in terms of the amount of
green house gases produced, measured in units of
carbon dioxide". It is meant to be useful for
individuals and organizations to conceptualize their
personal (or organizational) impact in contributing to
global warming. A conceptual tool in response to carbon
footprints are
carbon offsets, or the mitigation of carbon emissions
through the development of alternative projects such as
solar or wind energy or reforestation. A carbon footprint
can be seen as a subset of earlier uses of the concept of
ecological footprints.
Source: Wikipedia - Carbon Footprint
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