A U.S.-European mission sent a satellite into space to collect information about rising sea levels that will help scientists and first responders.
Did you know that reforestation programs have been around in the United States for more than 100 years? Learn about that legacy and how it helps the world.
The U.S. is formally withdrawing from an international climate accord but will reduce emissions through innovation without compromising economic growth.
Wind energy has come a long way. Today it's more efficient and cheaper than ever. What do you think you know about wind energy that isn't true?
It only took a few years — and good planning — to make big oil producer Texas the leader in U.S. wind energy.
The worldwide mix of fuels used to generate electricity is shifting, with a greater reliance on renewable energy sources and natural gas.
View some of President Obama's travels to other countries. He met dignitaries and people in all walks of life and saw treasured spots.
New solar technology could help provide cheap power to many of the 600 million people in Africa who currently lack access to reliable electricity.
Airports around the world are looking sunward to power their facilities — and they find solar energy makes good business sense.