United Methodist Bishop Thomas Bickerton talks Friday about how drilling for natural gas is affecting his congregations and the 187,000 members in Western Pennsylvania, while sitting in his Cranberry office. Bickerton is one of several religious and community leaders who signed a protest letter questioning the makeup of a federal committee that is reviewing fracking impacts.

PITTSBURGH — Bishops, nuns and rabbis are joining the environmental and social debate over natural gas drilling in the Marcellus Shale region, and many are seeking a balance that reflects their congregations.

“We have people’s lives who are being blessed or adversely affected by this,” said Bishop Thomas Bickerton of Pittsburgh, who leads more than 800 United Methodist congregations and 187,000 members in Western Pennsylvania, where major drilling is taking place.

“The conversations within the church are rather lively and robust,” Bickerton said, and he thinks gas drilling “warrants some careful looking” by religious groups and public officials.

Bickerton told The Associated Press that it’s a delicate topic. On one hand, he’s very supportive of the economic development, which gas drilling has spurred across the region. On the other, he said it appears the state has not thoroughly looked at all the issues around drilling, its impact on communities and the environment.

And as a West Virginia native, he’s seen how mining for another natural resource — coal — has helped and hurt communities.

More than 3,300 wells have been drilled across Pennsylvania in just the last few years. The boom has raised concerns about the use of hydraulic fracturing, or fracking, which injects chemical-laced water to break up the shale and allow natural gas to escape into the shale to push out the minerals.

Bickerton is one of several religious and community leaders who last month signed a protest letter to U.S. Secretary of Energy Steven Chu. The letter, which originated with the Environmental Working Group of Washington, D.C., questioned the makeup of a federal committee that is reviewing fracking impacts.

Bickerton’s Western Pennsylvania United Methodist Conference is one of many groups that have used church publications to examine the benefits and pitfalls of fracking. An article titled “The Morality of Fracking” appeared in The National Catholic Reporter last month, and the Reform Jewish Voice of New York State endorsed the drilling moratorium there.

Scientific and environmental issues aren’t the only concern.

“I believe personally that the church does have responsibility to engage the wider body of the community about what’s moral and what’s not. What’s ethical and what’s not,” said Bickerton. He said he doesn’t want to inhibit economic growth, yet is concerned that some in his congregation have been taken advantage of, such as with contracts they don’t understand or side effects they haven’t considered.