Renewable energy is electricity produced by fuel sources that renew themselves and do not diminish when humans tap them for power. Think the sun, the wind, plants and the heat at the Earth's core.

As of 2021, more than 67,000 wind turbines operate in the United States, in 44 states, Guam, and Puerto Rico. Wind energy mechanisms generated about 8.4% of the electricity in the U.S. in 2020.

In recent years, energy engineers have been working on a wide range of technologies that could help to generate and store ...

Researchers in Sweden have developed a powerful new material that dramatically boosts the ability to create hydrogen fuel ...

Water drops produce electricity when dripped through a small tube. ... and the energy produced is outweighed by the power needed to pump water through the system.

Spain's power company, Red Eléctrica, proudly declared on April 16 that enough renewable energy had been generated to cover demand. “The ecological transition is moving forward,” it said.