Because of long time delays for the carbon cycle, drastically different scenarios yield very similar results for a 20 year time horizon, but drastically different result for a 50 to 100 year time horizon. http://www.atmosedu.com/physlets/GlobalPollution/carbon_dioxideCLEANStudent.htm
Turning off all emissions (very unrealistic) will still leave atmospheric CO2 Levels at 350 ppm in the year 2110.
Global per capita emission have held steady for past 30 to 40 years. For the past 30 to 35 years emissions have been closely linked to population.
Global carbon emissions steady for first time since 1992 Drop in rich countries' emissions caused by recession in 2009 was nullified by steep increases from China and India http://www.guardian.co.uk/environment/2010/jul/01/emissions-recession
495 x10 15 BTU x 1054 Joule/BTU=5.11x10 20 J = 511 ExoJoules Average Power consumption in Watts = Yearly used/ (# of seconds in Year) Average 2007 Power Consumption =5.11x10 20 J/3.15 x10 7 s=16 TerraWatts
Organisation for Economic Co-operation and Development (OECD)
How much non-Fossil Fuel energy must be created in the next 25 years?