Churches are talking trash. No, not badmouthing other congregations, they're examining ways to reduce the waste they produce. Earth care is in vogue, and many Christians, believing that stewarding creation is a spiritual mandate, are looking to mesh environmentalism with their faith.

One leader in the movement is Joel Hunter, pastor of Northland: A Church Distributed, out of Longwood, Florida. Hunter hopes addressing environmental concerns will lead to increased opportunities for faith conversations. He calls creation care a "bridge issue" that unites people across religious and philosophical lines.

Northland, which is building a new 3,300-seat sanctuary, wants to reduce its carbon footprint. Northland distributed to its members a list of nine ways to care for creation, which include using energy-saving light bulbs, adjusting thermostats and fans, correctly insulating the church building, and recycling.

The church has employed Raymond Randall, a worship attender who works as a waste-management ...