Thursday, January 31, 2008

Climate Clock Blog

Climate Clock: "Climate Clock | Climate change and global warming are concepts that can be tracked by keeping up with changes in the atmospheric carbon dioxide on Earth, measured by scientists in parts per million (ppm). The tipping point is said to be around 500 ppm. Stay tuned. [Some experts now tell us 'the tipping point comes well before 500 ppm'.]"
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