Our climate has warmed over the last 130 years because of carbon pollution from human activities. (realitydrop.org)
We also encourage state and national agencies to work toward reducing carbon pollution from power plants. (nrdc.org)
An economy - wide cap on carbon emissions that would begin in 2012, with a target of reducing carbon pollution 17 percent by 2020 and 80 percent by 2050. (treehugger.com)