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The ads, funded by a left-leaning coalition, urge support for congressional legislation to curb greenhouse-gas emissions -- by framing the issue as an urgent matter of Biblical morality.

Conservative political consultant Randy Brinson

Emboldened by what they see as a kindred spirit in the White House, progressive and liberal Christians are stepping up their political activism in a big way.

A religious coalition called the American Values Network spent nearly $200,000 placing the global warming ads. Some political analysts credit the campaign with boosting support for the Waxman-Markey climate bill, which narrowly passed the House last week.

The coalition plans to spend an additional $150,000 in the coming months to enlist pastors in Nevada, Arizona and Colorado to rally support in the pews as climate-change legislation moves through the Senate.

Dr. Brinson tells his clients they are right to be worried. Such an aggressive political campaign by the religious left is unexpected, he says, and could prove powerful.