The U.S. Federal Energy Regulation Commission (FERC) reports that in January 2013, 100 percent of new electric generating capacity was renewable. The full dataset from FERC outlines the January additions: 958 megawatts of wind, 267 of solar, and 6 megawatts of biomass, totaling 1,231 megawatts of capacity.
The megawatts of wind and solar from January 2013 outnumbered the megawatts of natural gas and coal in January 2012. While this is exciting news, it is unlikely that this renewable-only trend will continue for the rest of 2013.
Below are two pie charts showing the new capacity in January 2012 and the new capacity in January 2013. Click on the charts for interactive content courtesy of grist.com.