Explainers

When developed from the right sources, biofuels offer huge potential as a clean-burning alternative to oil.

Coal-fired power plants, which produce a significant share of US electricity, have significant impacts on water quantity and quality.

A summary of Virginia Attorney General Ken Cuccinelli's misguided investigation of respected climate scientist Michael Mann.

How does local food move from the fields to the table?

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.