Obama calls climate change our biggest threat

In his 2015 State of the Union address, President Obama touched on a range of global challenges, but declared the environment his top concern. “No challenge...

Picture this: a world that protects its wetlands

Wetlands are home to rich biodiversity and serve important ecological functions, such as absorbing floodwaters and filtering pollutants. They benefit humans, providing food, fresh...

These trucks will soon deliver cleaner air

Trucks move 70 percent of U.S. freight, but they emit as much CO2 as 130 coal plants. That’s why President Obama's new fuel-economy standards are crucial.

Check out these 3 innovative solutions from young energy companies

New approaches to harvesting energy are taking shape. Three ingenious projects give you a taste of what the energy future might look like. The sky...

The climate is changing. It’s time to adapt.

A warmer world will raise sea levels and trigger extreme weather events. You can prepare for these events, and the U.S. will help other countries do that.

White House science adviser wants to hear from you about climate...

If you need answers on climate change, just ask the White House. In November, White House science adviser John Holdren asked the public to submit questions...
Wind turbines silhouetted by sun (AP Images)

Communities win with renewable energy

Americans love to compete. It might be baseball, or basketball or...green power? Beginning in 2013, a number of U.S. cities stepped up to the...
Drivetrain of vehicle powered by alternative fuel (AP Images)

Alternative-fuel vehicles are the heroes of this odyssey…on this day

What could be better than powering your car with the most abundant element on the planet? What if that resource also produced much less...
Pacific walruses affected by Arctic climate change (AP Images)

Photo of the day: Walruses face an uncertain future

What would you do if your home melted? It happened to these Pacific walruses, when rising Arctic temperatures liquified their icy abode. The 35,000...