"The current consensus is that the present day biosphere can be damaged if CO2 levels surpass 550 parts per million" |
"Right now we’re at 400 ppm, and we’re adding 2 ppm of carbon dioxide to the atmosphere every year. Unless we are able to rapidly turn that around and return to below 350 ppm this century, we risk triggering tipping points and irreversible impacts that could send climate change spinning truly beyond our control."
- 350.org
If, in fact, 550ppm CO2 is the threshold at which humans begin to suffer, and global emissions add approximately 2 ppm / year, then the earth has about 75 years until this threshold is met.
In addition, PBL Netherlands established that there was a rise of 2.4 ppm from 2011 to 2012. This gives the earth approximately 62. 5 years.
[According to the PBL there is some hope that his number will decrease.]
In addition, PBL Netherlands established that there was a rise of 2.4 ppm from 2011 to 2012. This gives the earth approximately 62. 5 years.
[According to the PBL there is some hope that his number will decrease.]
Only 75 years
This is within many of our lifetimes.