Live

Watch CBSN Live

"Largest" dead zone recorded in U.S. threatens marine life

The largest dead zone ever recorded in the U.S. has appeared in the Gulf of Mexico. It is primarily caused by fertilizer and sewage runoff that eventually forces marine life to leave -- or suffocate and die. Jeff Glor reports.
View CBS News In
CBS News App Open
Chrome Safari Continue
Be the first to know
Get browser notifications for breaking news, live events, and exclusive reporting.