If you were asked to provide a "ballpark estimate" of global atmospheric co2 concentrations at the beginning of the industrial revolution (1750-1850), you would choose:

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06-12-2017
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If you were asked to provide a "ballpark estimate" of global atmospheric co2 concentrations at the beginning of the industrial revolution (1750-1850), you would choose:

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Erudite1 Erudite1 · Answer 1 · 2017-12-18T15:43:42+01:00

Erudite1 Erudite1

18-12-2017

You should choose 300 PPM.
Before the industrial revolution, the atmospheric abundance of carbon dioxide is about 300 ppm. Since the era of industrial revolution started, the concentration of carbon dioxide in the atmosphere has increased by more than 40%

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