People walk on the Jialing River bed during a drought period on December 12, 2007 in Chongqing Municipality, China.

How Can Cities Keep Water Clean Now and in the Future?

As "megacities" grow in Africa and Asia, assuring residents long-term access to clean water may require a multidisciplinary approach.
A green Oregon Oak covered in moss with many branches

What is Old Growth, and Why It Matters

Old growth forests are often famed for their beauty, cultural and historical significance. But there's more to old growth than just the age of the trees.
A collection of Native American utensils and weapons

What We Lose When We Lose Indigenous Knowledge

By mistaking a culture's history for fantasy, or by disrespecting the wealth of indigenous knowledge, we're keeping up a Columbian, colonial tradition.
A fisherman on the dock with his catch.

How to Eat Seafood — Sustainably

Fish stocks are collapsing. But you can still enjoy your freshest local seafood without feeling too guilty—and here’s why.
A pod of dolphins

How Eco-Conscious is Your Eco-Tour?

Wildlife sighting business is booming. Here’s how to choose the tour operators that care about the animals.
Illustration of a wild boar, between 1868 and 1874

Denmark Builds a Wild Boar Wall

Is constructing a fence along the Denmark/Germany border really the best way to keep wild pigs away from domestic pigs?