Rather than take a fossil fuel and pollute and then require an offset say in the planting of an equivalent number of trees ( not that re-forrestating the earth wouldn't be anything, but a good thing. )

Instead, to use a biofuel, for example biodiesel, and using it ( + 1 amount of CO2 ), then mitigating that pollution by creating the biodiesel again whether from grain or algae ( -1 amount of CO2 ), thus creating a zero balance. You can then do this forever."

Graham Stoate

The ocean's food chain is based upon the growth of billions upon billions of microscopic plants. New satellite data show that ocean warming is reducing these plants ---- thus imperiling ocean fisheries and marine life, according to an article in the Nov. 7 issue of the scientific journal Nature.

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If current production of carbon from fossil fuels continues unabated, by the end of the century the land and oceans will be less able to take up carbon than they are today, the model indicates.

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