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O.T. Carbon reeased to the atmosphere by changes in land use

This weeks Proceeding of the National Academy of Sciences has a paper on this

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They work out that we have released some 133 Petagrams of carbon since we took up agriculture. That 133 x 10^12 grams

We've dumped about 240 Gigatonnes of carbon into the atmosphere since we took up industrialisation - that's 240 x 10^15 grams, or more than a thousand times more, (if I've got my units conversions right, which doesn't always happen).

Cursitor Doom's idea of undoing anthropogenic global warming by improving our land use looks a little unrealistic.

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Bill Sloman, Sydney
Reply to
bill.sloman
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Not quite. Peta is 10^15 so one Petagram is the same as one GigaTonne.

piglet (using google as my usual server is down).

Reply to
piglet

Oops. So it is. Thanks.

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That's not the web-site I was using when I got it wrong.

So Cursitor Doom was merely being unrealistic, rather than grossly unrealistic.

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Bill Sloman, Sydne
Reply to
bill.sloman

The point reference for super large quantities I use is 1 Mg= 1 metric ton, so a petagram is a giga-mega or giga metric tons.

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bloggs.fredbloggs.fred

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