Leaders of a group that encourages evangelical Christians to care for the environment say the oil spill in the Gulf of Mexico raises moral challenges for the country, the Associated Press reports.

The Revs. Jim Ball and Mitchell Hescox, leaders of the Evangelical Environmental Network, are visiting southern Louisiana to pray with people who have lost jobs because of the spill.

Joining them is the Rev. Galen Carey of the National Association of Evangelicals.

Ball says they took a boat ride off the coast Thursday and were saddened by sights of oil-spattered marshes where birds were nesting.

He says the oil spill is a stain on the nation's stewardship of God's creation, and should inspire people of faith to embrace cleaner energy sources. Ball says how the nation responds to the disaster is a matter of values.