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7 November 2009

The Breathing Earth

Many people are surprised when they first see a graph of the carbon dioxide levels measured at Mauna Loa in Hawaii. The first question asked is why is it going up and down each year? The answer is that you are looking the Earth breathing! There is much more land in the Northern Hemisphere than the Southern, and when spring arrives in the North, the growing plants suck CO2 out …


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