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"People in North Texas worry about tornadoes, not earthquakes. That's not the case in the small town of Cleburne, just south of Fort Worth. They've had six quakes so far this month. Cleburne happens to sit on a huge, recently discovered natural gas deposit called Barnett Shale. There's been a lot of drilling, and some people wonder if that has triggered the earthquakes."

Environmentalists say Florida officials are thwarting a 2-year-old law banning the spreading of sewage sludge on the Everglades.

Engineering projects hope to save Louisiana's shrinking coastal wetlands by diverting sediment from the Mississippi River -- but a new study says there is not enough mud in the Mississippi to do the job.

Rebecca Williams reports biologists are trying to figure out how to keep panthers and people from running into each other.

The landfilling of 3.9 million tons of coal ash from a spill at TVA's Kingston Fossil Plant may or may not be a boon to one of Alabama's poorest counties.

"The earthen dikes supporting a huge coal ash landfill at a Tennessee power plant were 'on the verge of failure' long before they collapsed and sent tons of toxic muck into a river and lakeside community, an engineering consultant said Thursday."