April 21, 2016, 5am PDT
The executive director of the Bayou Land Conservancy takes to the pages of the Houston Chronicle to describe the conservationist and landscape-focused efforts that can prevent floods like those that struck Houston this week.
January 28, 2015, 12pm PST
In 20 years, dam removal has gone from a "fringe notion" to "wide acceptance." National Geographic explains how and why this sea change occurred.
June 5, 2008, 2pm PDT
<p>The U.S. Army Corps of Engineers has made final a decision that says much of the Los Angeles River is not navigable, and is therefore not a river. It will retain some Clean Water Act protection, but developing on its watershed may become easier.</p>
June 3, 2008, 9am PDT
<p>A draft decision by the Army Corps of Engineers says that because a boat cannot navigate its waters, the L.A. River doesn't qualify as a river. Environmentalists are outraged, as hundreds of square miles of watershed are at risk of losing protection.</p>