Renewable Energy

Transportation remains the largest source of climate-warming greenhouse gases in Washington. Tailpipe emissions amount to about 40 percent of the…

Solar power can feel out of reach. Upfront costs are usually considerable and you need a sunny roof or open space where you can put the panels.Community…

Gov. Jay Inslee is pushing to get Washington state to 100 percent clean energy by 2045. And he's not alone. Dozens of environmental groups, labor…

California made headlines this week as Governor Jerry Brown signed a pledge to get all of its electricity from renewable sources by 2045. Clean energy…

The country's National Grid announced Friday it was on its way to a full day without requiring its coal plants to produce power. Britain plans to eliminate the energy source by 2025.

Nearly 90 percent of Kentucky's electricity is from coal — the cheap energy source that helped build its manufacturing economy. Now it's struggling to respond as more businesses want clean energy.

More than a third of the credits issued under a tax credit program for renewable energy companies in Oregon went to problematic projects. That's...

San Francisco already required buildings to be "solar ready," and starting in 2017, actual panels will be mandated. It's the first major U.S. city to take such a step, according to the bill's sponsor.

At the Heartland Biogas Project, spoiled milk, old pet food and vats of grease combine with helpful bacteria in massive tanks to generate gas. It's all thanks to anaerobic digestion.

Renewable energy is taking off across the nation, but storing the energy is still a problem that is challenging companies to innovate, with solutions ranging from molten salt to ice.