EPA to release new fracking rules

WASHINGTON -- Natural gas will move to the forefront this week on Capitol Hill.

Tuesday the Environmental Protection Agency is set to complete rules to curb air pollution from onshore oil and gas development.

The rules are a part of a bigger battle. It's over what's known as fracking. That's a controversial technique.

It uses vast amounts of chemically-laced water, sand and pressure to crack shale rock and release gas.

Environmentalists fear the process could contaminate ground water.