So How Long Have We Got?
450 ppm has beeen set as a target by the European Union for C02 concentration in the atmosphere as the maximum safe level to keep global warming below an increase of 2C. At current rates of emission, how long will it take us to get to 450ppm?
  • Years
  • Days
  • Hours
  • Mins
  • Secs

But this is just calculating the time left using only C02 levels. We know that methane (CH4) is way above pre-industrial levels so we should factor that in, and restart the calculation.

And then there is nitrous oxide, another powerful GHG emitted by agriculture and industry.

The above is based on information in Wikipedia "CO2 Equivalent" and related links, but is not to be considered accurate. The point being made is that we are out of time to avert serious global warming. The 30% reductions in CO2 emissions from 2005 levels promised in the 2009 Copenhagen accord won't even begin to address the problem.
See also: THE NOAA ANNUAL GREENHOUSE GAS INDEX (AGGI)