- In 2014 the CO2 concentration hit 400 ppm.
- This is about 43% above the pre-industrial (1750) level of 280 ppm.
- After 20 years without emissions, we would lose about 40% of the excess CO2.
- The temperature increase is estimated at 0.85° C (1.5° F).
- But including other greenhouse gases, the CO2eq concentration hit 478 ppm
- A pretty scientific page on atmospheric CO2: Think Global Green
- Also pretty good at CO2
- CO2-eq is used to mean the equivalent CO2 concentration, holding other
gases fixed at the pre-industrial level. So you have to subtract off the
pre-ind level off CH4 and N2O - Interesting technical discussion
