The state of the U.S. solar industry: 5 questions answered
What's at stake as the Trump administration imposes trade sanctions on imported solar panels?…
WATCH: Trump authorizes new tariffs on solar panels, washing machines
The U.S. solar industry is split over the issue.
Solar plane completes dangerous 3-day flight over the Pacific Ocean
The Solar Impulse-2 finished the most challenging leg of its around-the-world trip, which started in March 2015 in the United Arab Emirates, in an attempt to draw attention to clean-energy technology.
Watch 1:36
In March, 47 percent of Spain's electricity came from renewable sources.
Heavy rainfall in Costa Rica has caused a spike in hydroelectric production this year. Together with green energy from sources like geothermal, wind, solar and biomass, the power glut means the Central American country's energy utilities haven't needed to burn…
The giant spot on the face of the sun has scientists scratching their heads. By the time it rotated into our view, it was already 80,000 miles wide, big enough to fit all of Jupiter, big enough to lay 10…
SAN JOSE, Calif. -- President Barack Obama is showcasing Wal-Mart, often a target of labor groups and other Democratic constituencies, to promote advances in energy efficiency in his broader campaign to confront climate change. Obama on Friday was to announce…
video interview with Bill Ritter…
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