See photos of Freshwater Conflict in this freshwater photo gallery from National Geographic.
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.
Learn about the energy challenges we face in the future by calculating your carbon footprint, taking quizzes, and more.
Calculate your carbon footprint from the energy you use, including car travel, air travel, home energy, and renewable energy.
Freshwater Hero - Zeb Hogan
See photos of freshwater mammals, such as manatees, hippos, otters, and more, in this photo gallery from National Geographic.
Learn about the water consumed to make everyday products.
Meet the Freshwater Heroes at National Geographic
Learn all you wanted to know about Chinese paddlefish with pictures, videos, photos, facts, and news from National Geographic.