A new generation of inexpensive, portable devices that allow air quality monitoring to be more targeted is being tested in cities across the U.S.
Generating electric power from flowing water is a non-polluting energy source. Learn five ways water power supports a clean-energy economy.
More than 230 million people worldwide know the breathing difficulty of asthma. Air pollution increases asthma, but treatment and prevention can help.
A country that diversifies its energy mix insulates itself from energy disruptions and strengthens its energy security.
New technologies suck CO2 from sources before it enters the atmosphere. The U.S. expands this technology to reduce emissions contributing to climate change.
Black soot produced by carbon-based fuels is falling on the Arctic Ocean, absorbing heat and accelerating melting. Arctic nations want to reduce soot.
The whole world must protect, respect and nurture the Arctic region. “One Arctic” is the guiding theme for U.S. leadership of the Arctic Council.
President Obama wants to protect landscapes and people from the consequences of climate change. He'll do that by preserving natural spaces.
More firms are investing in solar panels, wind turbines and other renewable-energy equipment to bring down energy costs and reduce greenhouse gas emissions.