The 2012 average annual concentration of CO2 in the atmosphere (Mauna Loa Observatory) is 393.84 parts per million (ppm). The 2011 average is 391.65 ppm.
Crise de l'euro + Fukushima : avez-vous remarqué comme on n'a jamais aussi peu parlé du climat dans les médias ?
Negotiations heading towards high warming, high cost pathway - Publications - Climate Action Tracker6th December 2011 Delaying any decisions on future climate action until 2015 or 2020 will bring a rapidly increasing risk in costs and threatens the likelihood of the world being able to keep global warming to below 2 degrees C, the Climate Action Tracker warned today in its Durban update.
Carbon Markets, Trading With Our Future