AdvertisementCalif. To Begin Rationing Greenhouse Gas EmissionsNovember 13, 2012Christopher JoycefacebookEmailCalifornia begins a new plan to ration greenhouse gas emissions from large companies on Wednesday. Big companies must limit the greenhouse gases they emit and get permits for those emissions. Above, the Department of Water and Power San Fernando Valley Generating Station, in Sun Valley, Calif., in 2008. (Getty Images)