Join Expedition Blue Planet: North America, a five-month interactive exploration of critical water issues, as they roll across the U.S., Canada and Mexico.
Climb aboard for an epic public transit tour of Switzerland. This seven-day itinerary is a celebration of all things transport: trains, boats, buses, zip lines, cogwheel trains, funiculars, and more.
A statement of sustainability from the National Geographic Society.
See how much you don't know about energy use and energy sources with this quiz from National Geographic.
Freshwater Hero - Zeb Hogan
Learn about the water consumed to make everyday products.
Sustainability at National Geographic
It's home to millions of people who lack even one lamp, but also a frontier of great change and innovation. How much do you know about sub-Saharan Africa's energy potential?
Quiz your knowledge of Global Warming at National Geographic
Habitat for Humanity of Washington, D.C. is a grantee of the Great Energy Challenge initiative.