The US Natural Resources Defense Council and Ocean Futures have teamed up to protest against US Navy Sonar testing, which is putting the lives of cetaceans at risk.
The Navy's "Low-Frequency Active" (LFA) sonar program is designed to flood 80% of the ocean with sound to detect submarine movements. Tests run in the Bahamas last year resulted in the strandings of four different species of whales. All but one suffered hemorrhaging around the inner ear.
To take action just go to http://www.nrdcaction.org/index.asp?step=2&item=515. The US Natural Resources Defense Council (NRDC) and Ocean Futures Society (OFS) have set up this web page to make it easy for you to send electronic messages of protest to a U.S. senator and representative.
It is not restricted to US citizens and only took me a minute to do so give it a go.