Ag runoff

A record-setting "dead zone," where water doesn't have enough oxygen for fish to survive, has appeared this summer. One major cause is pollution from farms.

Agricultural runoff is a problem in Illinois and many other farm states. Nitrogen, phosphorous and chemicals help with yields, but too much winds up in…

Midwest waterways are getting lots of attention this summer. Scientists from the U.S. Geological Survey and the Environmental Protection Agency have…