Explainers

Plug-in hybrid electric vehicles combine a gasoline or diesel engine with an electric motor and a large rechargeable battery.

Biomass (plant material and animal waste) is the oldest source of renewable energy, used since our ancestors learned the secret of fire.

Resource center for effective implementation of California's Sustainable Groundwater Management Act, the first-ever statewide requirement for groundwater management.

A hugely valuable crop with many uses, from animal feed to biofuels, soybeans also have an unfortunate by-product: tropical deforestation.

Solar energy—power from the sun—is a vast, inexhaustible, and clean resource

Oil shale is a dirty and expensive source of unconventional oil.

Over a quarter of the oil consumed in the United States is used in our homes, businesses, and industries.

A better, smarter way to live.

Planes, trains, and ships all use huge amounts of oil. We can do better.

An in-depth analysis of eight leading fossil fuel companies finds that none of them has made a clean break from disinformation on climate science and policy.

UCS serves a nuclear safety watchdog. Here are our recommendations for safer, more secure nuclear power.

Renewable energy can be increased significantly without affecting the reliability of the electricity grid. Studies by the experts who plan and operate the electricity grid overwhelmingly confirm it.