National Geographic

Ethiopia is planning to construct a large hydroelectric dam on the Nile River to supply power for itself and neighboring countries.

Lawmakers are likely to consider a controversial plan this summer to remove a series of dams on the Klamath River to help restore endangered salmon populations.

Cities plan to cut off individual parking garages is a gamble, says Josie Garthwaite in National Geographic -- yet making it impossible to park is one of the few yet most effective tools that reduces driving.

This collection of city profiles looks at cities around the world that are making major improvements to the way they handle and provide water.

The mark of human civilization will last long after humans go extinct, according to this article looking at the anthropocene, or the age of humankind.

Construction is nearing completion on the longest railway tunnel in the world.

The small town of Perugia, Italy has left its traffic worries behind by implementing various driving restrictions and transportation solutions like escalators and a "minimetro".

Beneath Paris is an underground network of tunnels and quarries, long closed to the public. National Geographic takes a tour of this forbidden part of the city, where urban explorers keep tradition alive.

National Geographic tackles the controversial issue of population growth, and the sustainability of a growing population. Should we worry about maxing out the planet? Not necessarily, according to Nat. Geo.

The federal government set aside $5.5 billion in stimulus funding to retrofit its huge fleet of buildings. $4.5 billion is to be spent on green building projects, some of which have already been launched.

Carbon dioxide is one of the most widespread greenhouse gases produced by humans. Trees can absorb it, but release it when they die. Scientists are looking to build artificial trees to do the job permanently.

A new report from the Natural Resources Defense Council shows that many parts of the Great Plains and the Southwest U.S. are facing severe water shortages in the near future.

This article from National Geographic examines the rapidly depleted Jordan River and how saving it could bring Israel and its quarreling neighbors together.

This piece from National Geographic takes a look at the three-year drought that's plaguing California's cities and farms.

Small-scale nuclear reactors could be a new, cheap way to provide power for neighborhoods. But their inherent controversy remains.

The Sahara desert is becoming increasingly green, according to satellite imagery -- which scientists are attributing to rising temperatures associated with global climate change.

The Seasteading Institute, a group that advocates creating sovereign nations in international waters, announces the winner of their seastead design contest.

Advances in material development have brought to the market a new type of concrete that can bend under pressure and heal cracks with the addition of water.

This piece from National Geographic looks at how green roofs are sweeping across the tops of buildings all over the world.

Anthropologists have discovered traces of highly organized and gridded cities in the Amazon rainforest dating back to the 1200s.