Representative Brian Mast of Florida, one of the signers of the resolution, said in an interview that he thinks “it’s important that we take climate change very, very seriously because the threats that are posed by that are very serious.” “I’m just not a person that believes we should be turning a blind eye to it,” he said.

The resolution is evidence that at least some congressional Republicans are willing to label climate change a threat despite the fact that President Trump once called global warming “a hoax.” Still, a call to action from a relatively small number of House Republicans won’t necessarily translate into any kind of significant legislation to address global warming. The Republican Party has a track record of rejecting climate-science in recent years, and supporting an agenda that would increase the burning of fossil fuels while eliminating environmental regulation. That’s unlikely to fundamentally change anytime soon.

In interviews, several Republican lawmakers who signed the resolution indicated they would consider supporting legislation to incentivize the use of clean energy. A number of legislators sponsoring the resolution made clear, however, that they would not support a carbon tax. Some former Republican officials and conservative policy analysts have endorsed the idea of imposing a price on carbon emissions, but many elected officials—in a party where opposition to increased taxation has become something of a conservative litmus test—aren’t willing to do the same.

“I think that’s a non-starter for Republicans in Congress,” Costello said, adding that he does not support a carbon tax. “I am not there yet, no,” Bacon said when asked if he would back such a policy. “I have not been a supporter of carbon taxes in the past, and I don’t think I would be inclined to as we move into the future,” Representative Pat Meehan of Pennsylvania, another sponsor of the resolution, said in an interview.

In an apparent indication of just how difficult it is to get a group of congressional Republicans to endorse any kind of call for climate action, the resolution itself does not explicitly spell out and affirm the scientific consensus that greenhouse gases generated by human activity are the primary driver of global warming. Instead, the declaration notes only that human activity has “been found to have an impact” on a changing climate, and calls for “efforts to balance” that impact.

Bacon said in an interview that while “the evidence is clear that there has been an increase in temperature. It’s always a little bit debatable how much is the human element versus cyclical.” But, he said: “Regardless, you still want a cleaner planet,” adding that if Earth’s temperatures continue to rise, that would be “a serious threat.” “I don’t like the hyperventilating, and all the anger out there,” he said, noting that he hopes to “work across the aisle and find some middle ground on this.”