The report I mentioned here last week was released by the Intergovernmental Panel on Climate Change on Monday. The Special Report on Renewable Energy Sources and Climate Change Mitigation (SRREN) found that for an investment of only about 1 percent of global GDP, renewable energy could account for almost 80 percent of the world's energy supply within four decades.
"Close to 80 percent of the world’s energy supply could be met by renewables by mid-century if backed by the right enabling public policies a new report shows."
"The findings, from over 120 researchers working with the Intergovernmental Panel on Climate Change (IPCC), also indicate that the rising penetration of renewable energies could lead to cumulative greenhouse gas savings equivalent to 220 to 560 Gigatonnes of carbon dioxide (GtC02eq) between 2010 and 2050."
"The upper end of the scenarios assessed, representing a cut of around a third in greenhouse gas emissions from business-as-usual projections, could assist in keeping concentrations of greenhouse gases at 450 parts per million."
"This could contribute towards a goal of holding the increase in global temperature below 2 degrees Celsius – an aim recognized in the United Nations Climate Convention's Cancun Agreements."