A top environmental advocate called it "a historic tipping point" when the Rev. Rick Warren and other prominent evangelicals joined a new drive to get their community to fight global warming.

But activists banking on a quick shift in President Bush's environmental policies will be disappointed — support from just any evangelical figure won't do. The movement is a diverse one, and some of its most politically influential leaders still question the science behind climate change.

Evangelical activism on AIDS in Africa, the civil war in Sudan and sex trafficking has deeply influenced the Bush administration. But environmental causes don't yet store the same kind of passion among conservative Christians.

"The groundwork is being laid to become much more unified in this area, much as they were on abortion and other issues," said Corwin Smidt, a Calvin College professor who specializes in religion and politics. "Whether or not they can achieve that unity remains to be seen."

Analysts agree that the new push, called the Evangelical Climate Initiative, is at least a noteworthy development.

Years of activism culminated in the release Wednesday of the statement, "Climate Change: An Evangelical Call to Action," which was signed by many leading conservative Christians including Warren, author of "The Purpose Driven Life," the president of evangelical Wheaton College, the national commander for The Salvation Army and heads of seminaries and megachurches nationwide. Several prominent black and Hispanic pastors were among the signers.

The statement frames environmental protection as a Christian imperative, fulfilling a biblical command to care for God's creation. It urges federal lawmakers to approve mandatory cuts in carbon dioxide emissions, but to do so in a way that doesn't hurt businesses. Among the funders of the initiative, which includes TV and print ads, is the Pew Charitable Trusts.

"There's real momentum here," said the Rev. Jim Ball, head of the Evangelical Environmental Network, a leader of the climate initiative and a group perhaps best known for its clean-air campaign "What Would Jesus Drive?"

Fred Krupp, president of the advocacy group Environmental Defense, called the announcement a "historic tipping point" indicating that global warming is not just a liberal issue. However, Christian leaders with close ties to the Bush administration have expressed skepticism about the initiative through their own group, called the Interfaith Stewardship Alliance. They said in a statement that "the science is not settled on global warming," and argued that most U.S. evangelicals do not back the call for regulating greenhouse emissions.

Among the religious leaders who support the Stewardship Alliance are James Dobson of Focus on the Family, Charles Colson of Prison Fellowship Ministries and the Rev. Richard Land, head of the public policy arm of the Southern Baptist Convention, the nation's largest Protestant group.

"If you look at public opinion surveys, there's a basis in the evangelical community for these kinds of initiatives on the environment," said John Green, a specialist in religion and politics at the University of Akron. "But they're not there yet."

LEARN MORE

Evangelical Climate Initiative: www.christiansandclimate.org

Interfaith Stewardship Alliance: www.interfaithstewardship.org/pages/home.php