Billionaire environmentalist Tom Steyer is committing time, money and effort to keep presumptive GOP presidential nominee Donald Trump from winning...

Boulder County commissioners re-implemented a local moratorium on hydraulic fracturing, or fracking, Thursday, defying both state Supreme Court rulings and their own...

In March a group of Democratic attorneys general formed "AG's United for Clean Power." It sounds nice enough, doesn't it?...

Former Vice President Al Gore told The Hollywood Reporter his 2006 film "An Inconvenient Truth" actually underestimated how serious global...

As they don caps and gowns, endure commencement speeches and take their diplomas, many high school and college graduates face...