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.

Humans have been harnessing the energy of river currents for centuries, using water wheels spun by rivers initially to process grains and cloth. Today, hydropower provides about 16 percent of the ...

Carbon-free electricity has never been more plentiful. Wind and solar power have taken off over the past two decades, faster than experts ever expected. But it hasn’t yet been enough to halt the ...

At EU level, renewables make up the largest share of power generation, followed by fossil fuels and nuclear energy.The percentage of renewable energy and other types of energy used to produce power is ...

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.

China, which already leads the world in the sheer amount of electricity produced by wind and solar power, is expected to double its capacity by 2025, five years ahead of schedule.

By comparison, that same megawatt-hour produced from coal requires 587 gallons of water. That extra water is used to control emissions and to manage coal ash and other wastes.