(CNN) – Online ads, backed by a six-figure buy from a conservative group, are hitting the web urging lawmakers to oppose a tax on carbon emissions.
The campaign from Americans for Prosperity goes after senators and representatives from 15 states, and begins with a budget of $175,000, according to a release from the organization.
The senators targeted are all Democrats: Mark Begich of Alaska, Mark Udall of Colorado and Kay Hagan of North Carolina.
"Carbon taxes are bad for American industry and jobs," AFP President Tim Phillips wrote in a statement. "They drive up utility bills and the cost of gasoline for American families and businesses, all while hurting job growth and driving business overseas. Deliberately driving up energy prices is a bad approach that slows economic activity."
A tax on carbon emissions has gained little traction among lawmakers in Washington, and has also been met with resistance from President Barack Obama's administration.
"We would never propose a carbon tax, and have no intention of proposing one," White House Press Secretary Jay Carney said in November in the aftermath of Superstorm Sandy.
But proponents say such a tax would help the U.S. reduce its massive federal deficit and discourage the use of energy sources that harm the environment.
Obama's last attempt at passing climate change legislation did not include a carbon tax, opting instead for a plan that would cap emissions on plants and allow trading of emission credits. That plan passed the House but failed in the Senate.
AFP vocally opposed the cap and trade legislation, and has long fought proposed further regulations restricting emissions.
The group is partially funded by the industrialist Koch brothers, whose holdings include manufacturing and petroleum refining companies.