Green diplomacy: Racing to plant a forest
Running a 10-kilometer race will burn calories and improve your health. Beyond those benefits, an annual footrace contributes to reforestation and erosion prevention in...
You’ll never guess what’s in these stunning Olympic medals [video]
Athletes from around the world will be vying for Olympic and Paralympic medals during this year's games in Rio. But these medals have some special details.
City transit systems look to the future
Several U.S. cities are leveraging technology to reduce traffic's effect on climate change. Look at the winner of the "Smart City Challenge."
Our Ocean 2016
Join world leaders as they discuss ways to protect our ocean for the future of the world during the #OurOcean conference.
U.S. island in South Pacific goes solar
Remote Ta'ū Island in American Samoa switched from burning 300 gallons of diesel fuel a day to nearly 100 percent solar power. How did they do it?
With water projects in West Bank and Gaza, U.S. cultivates hope
The U.S. is connecting Palestinians to water treatment systems that keep people safe and promote jobs. The possibility for peace is growing in the process.
A new kind of park emerges on the prairie
American Prairie Reserve, a public-private partnership, is bringing back buffalo, birds and big, open sky to the Montana prairie.
Electric cars could dominate some city roads sooner than you think
Falling costs for the technology powering electric cars and stricter emissions regulation are among the reasons electric vehicles are becoming more popular.
Responding to the global challenge of climate change
What will you be doing in 2025? The United States is going to be producing 26 percent less greenhouse gas than it did in 2005.