The pope's call to climate action received a lukewarm response from Catholic leaders in the United States.
Republicans, the fossil fuel industry, and the Heartland Institute are working to discredit the pope's encyclical -- even before its release.
Can we get an amen?
Methane, a powerful greenhouse gas, is leaking from wells and pipelines across the country.
Lobbying behemoth American Legislative Exchange Council plans to attack environmental protections when Republicans take control of Congress and several state legislatures.
The world’s fastest submerging state is looking to nature in an ambitious plan to turn back the tide, and to BP to fund it -- but will it work?
California's historic drought is forcing once-squeamish Californians to take a new look at “toilet-to-tap” water reuse.
Lisa Jackson on Apple's wide-ranging plan to green its act.
Heat waves and water shortages could devastate U.S. farmlands devoted to corn crop, a new report warns.