There are some problems clean energy from wind and sun cannot solve. Two new studies provide a roadmap of the challenges ahead.
The need to stop global warming in its tracks has spurred the growth of wind and solar technologies that are helping reshape the electricity industry.
Energy efficiency, renewable energy sources and radical changes to diet together can save the planet.
The Roman Catholic leader forthrightly reminds oil company CEOs that climate change is a moral issue.
Five of the world's largest solar installations are under construction there, and a sixth is in the pipeline.
Mexico plans to produce 43 percent of its electricity from renewables within six years.
Republicans who for years have voted against subsidies for solar and wind power are now eager to have government subsidize coal. Meanwhile, China’s success in renewables grows.
Achievements in Portugal, Scotland and Costa Rica show that a 100-percent-clean electricity grid is no longer a dream.
Investments are falling and jobs vanishing in the American solar sector. New tariffs on imports are blamed.