IPCC Special Report on Renewable Energy Sources and Climate Change Mitigation, 2011
By Staff Reporter
As emission rates substantially exceed natural removal rates, concentrations of CO2 will continue to increase, which will raise global mean temperature. In the absence of additional climate policies, the Intergovernmental Panel on Climate Change (IPCC) projected in 2007 that global average temperature will rise over this century by about 1.1°C to 6.4°C. This range variation arises from uncertainty about the amount of greenhouse gases that will be emitted in the future and from uncertainty about climate sensitivity.
Greenhouse gas (GHG) emissions associated with the provision of energy services are a major cause of climate change. The IPCC 4th Assessment Report 2007, concluded that “Most of the observed increase in global average temperature since the mid 20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.” Concentrations of CO2 have continued to grow since the Report to about 390 ppm CO2 or 39 per cent above pre industrial levels by the end of...