Calculations: Carbon Dioxide in the Atmosphere


The concentration of CO2 in the atmosphere was 295 PPM in 1900. It is
now about 305 PPM. 

CO2 has an average lifetime of 100 - 120 years in the atmosphere. 

1 PPM of CO2 in atmosphere = 2.13 Gt (billions of tons) of carbon.

375 PPM - 295 PPM = 80 PPM. 80 X 2.13 billion tons = 170.4 billion tons.

Conclusion: There are 170.4 billion more tons of CO2 in the atmosphere
now than in 1900. 

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