Explainers

Smart planning and thoughtful safeguarding—not weaponization—will protect US interests in space.

Cars and trucks are one of the leading causes of air pollution—but cleaner vehicles can help.

Transportation is one of the largest sources of US global warming emissions—but cleaner vehicles can help.

Tropical deforestation accounts for about 10 percent of the world’s global warming emissions.

Tropical deforestation accounts for about 10 percent of the world's global warming pollution. Here are ten reasons why protecting tropical forests is in the United States' best interest.

Locations and information for California renewable energy projects, including wind, solar, biomass, and geothermal energy.

California’s freight system is an integral part of the US economy—but it needs modernization.

Heavy-duty trucks make up 7 percent of all vehicles on US highways, yet consume more than 25 percent of the oil.

At a basic level, nuclear power is the practice of splitting atoms to boil water, turn turbines, and generate electricity.

Ethanol is a key ingredient in today's gasoline—but the promise of ethanol as an oil and climate solution depends on how it’s made and what it’s made from.

Learn which fossil fuel companies are most responsible for the heat-trapping carbon emissions that are warming the planet.

Tropical deforestation accounts for about 10 percent of the world's heat-trapping emissions, equivalent to the tailpipe emissions of 600 million average U.S. cars.