Renewable Energy

Huge companies including Apple, Wal-Mart and Ikea have spent big bucks on green energy — why are so many governments lagging behind?

Battery-powered electric cars and hydrogen fuel cell vehicles have both seen advances in their development, and one or both of these technologies may represent the future of "green" automobiles.

Sin City just got a little greener.

In 2015, green might just be the new black.

Researchers in Australia recently developed a solar energy system that can convert over 40 percent of the sunlight that hits it into electricity.

A new superthin material can cool buildings without requiring electricity, by beaming heat directly into outer space, researchers say.

A British “poo bus” went into service last week, powered by biomethane energy derived from human waste at a sewage plant.

Blu-ray discs could help make the solar cells used in solar panels more efficient, researchers say.

To capture more energy from the sun, one company is putting solar panels where they've never gone before: in the street.