Taxonomy term

exxon

Of sounds and cetaceans: Quieting a noisy underwater world

Marine mammals live in a world of sound. In the open ocean, whales and dolphins depend on sound waves, using echolocation to navigate, find food, attract mates and communicate. But their clicks and calls are not the only noises underwater: Oil and gas exploration, seafloor mapping, and ship and submarine navigation have increased dramatically over the past few decades, making the world’s oceans noisier than ever.

18 Mar 2010

New York's Dirty Secret: The effort to clean up America's largest oil spill

Wedged between the hard-bitten boroughs of Brooklyn and Queens, N.Y., lies a six-kilometer-long slip of sickly green water called Newtown Creek. Dubbed the most polluted waterway in America, this tidal tributary of the East River has no natural headwater: The water that feeds the mostly stagnant creek is a combination of industrial wastewater, stormwater runoff and, after a hard rain, raw sewage.

28 Aug 2008