AUSTIN (AP) – A legislative committee is considering a bill that would make Texas the first state to demand gas drillers make public the chemicals they use to shatter and permeate thick rock formations.

The bill has been presented by state Rep. Jim Keffer, a Republican who chairs the House Energy Committee.

Gas drillers have kept under wraps the mix of water, sand and chemicals they use to extract once out-of-reach minerals from shale formations.

The hydraulic fracturing, or fracking, and horizontal drilling techniques were developed in Texas. The state is also the nation’s largest oil and gas producer.

Some say passage of a bill in Texas could pave the way for similar legislation nationwide.

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