1. IPCC fourth assessment report, climate change 2007 synthesis report, contribution of working groups I, II and III to the fourth assessment report of the intergovernmental panel on climate change;IPCC,2007
2. NOAA. Mauna Loa CO2 annual mean data; 2009.
3. Target atmospheric CO2: where should humanity aim?;Hansen;Open Atmos Sci J,2008
4. Stabilizing climate requires near-zero emissions;Matthews;Geophys Res Lett,2008
5. A burden beyond bearing;Monastersky;Nature,2009