Three large U.S. cities have used new technology and environmentally friendly policies to help their residents breathe easier.
Batteries from the U.S. that rely on zinc and air may be the future of renewable energy. Eight countries in Africa, Asia and the Americas are using them.
El Salvador's growing energy demands will be met, in part, with 10 new solar energy plants that the U.S. is helping to finance.
Clothing company PVH has added Ethiopia to its supply chain in a big way with an environmentally friendly industrial park employing thousands of women.
The United States is supporting India with its ambitious clean energy program, including this solar rooftop project in partnership with Indian Railways.
A new U.S.-backed initiative is promoting innovative ways to integrate nuclear power into carbon-free and renewable energy systems.
Fort Collins, Colorado, began as a cavalry outpost in the Old West, but grew into a 21st century capital of scientific innovation, tackling the world's greatest energy challenges.
Four U.S. research centers are developing technologies that can turn certain plants — such as switchgrass, poplar or sorghum — into biofuels.
Women like Chebet Lesan are leaving traditional jobs and making their way as businesswomen. Read about several entrepreneurs who are breaking barriers in Africa.