Poll: water pollution top environmental concern

A Gallup poll out today finds that Americans' top environmental concern is not global warming but rather water pollution. 59% said they personally worry a "great deal" about pollution of drinking water, topping seven other issues Gallup mentioned. Only 34% said they worry a "great deal" about global warming, the least of any issue in the poll.

The poll has a margin of error of +/- 3%