JUDY WOODRUFF:

Now, as shale and natural gas fracking booms in Texas, there are new questions about its possible connection with air quality and health problems.

That's the focus of a new report jointly done by the Center for Public Integrity, Inside Climate News, and The Weather Channel. It specifically looked at drilling in a huge area known as the Eagle Ford Shale Play, where, as you can see, the oil wells are in green dots, gas wells in red.

It examined almost 300 health complaints in the region potentially linked to fracking. The industry is disputing the report.

Jim Morris is one of the journalists who worked on it for the Center for Public Integrity.

Welcome to the program.

JIM MORRIS, Center for Public Integrity: Thank you.