A couple of Plans

Obama's Plan to reduce emissions 80%
http://www.barackobama.com/pdf/factsheet_energy_speech_080308.pd

"The alternative to business as usual, Plan B calls for cutting net carbon dioxide emissions 80 percent by 2020. This will allow us to prevent the concentration of CO2 in the atmosphere, already at 384 parts per million (ppm), from exceeding 400 ppm, thus keeping future global temperature rise to a minimum."
http://www.earth-policy.org/Books/PB3/80by2020.html