Solar power has always had a reputation for being expensive, but not for much longer. In India, electricity from solar is now cheaper than that from diesel generators. The news - which will boost India's "Solar Mission" to install 20,000 megawatts of solar power by 2022 - could have implications for other developing nations too.

The author looks at an ambitious Japanese proposal to install solar panels on the moon's surface and beam the resulting solar energy to stations on the earth.

Orbiting solar power plants that harness the sun’s energy from space and beam it to Earth could be economically viable within three decades based on technologies currently being tested, according to a new study by scientists with the International Academy of Astronautics.

The author argues that the technology for fusion energy is showing promise, bringing the dream of an "essentially inexhaustible" supply of power fueled by seawater closer to reality.

A special inspection of U.S. nuclear plants after the Fukushima disaster in Japan revealed problems with emergency equipment and disaster procedures that are far more pervasive than publicly described by the Nuclear Regulatory Commission, a review of inspection reports by ProPublica shows.

As America's nuclear power plants have aged, the once-rural areas around them have become far more crowded and much more difficult to evacuate. Yet government and industry have paid little heed, even as plants are running at higher power and posing more danger in the event of an accident.

Scientists claim to have found the 'Holy Grail' of science in an artificial leaf that could turn ever British home into its own power station. The leaf, which is the same size as a playing card, mimics the process of photosynthesis that plants use to convert sunlight and water into energy.

Beaming solar power down from space still looks awfully futuristic more than four decades after it was proposed. But dreams of energy driven by eternal sunshine have pushed several projects forward in the United States, Europe and Japan.

The United States is too reliant on China for minerals crucial to new clean energy technologies, making the American economy vulnerable to shortages of materials needed for a range of green products — from compact fluorescent light bulbs to electric cars to giant wind turbines.

A senior US official called China's growing innovation a "Sputnik moment" that should spur the United States to ramp up investment in clean energy, despite a shift in Washington on climate change.