I take the poll with a grain of salt, even within that article, they're clear that other polls show much lower Republican acknowledgement of global warming as a serious problem and willingness to enact solutions.
And here's the kicker, even if the poll is accurate and more than half of Republicans acknowledge the issue of global warming and support legislative solutions, a far higher percentage approves of the current administration which has struck talk of global warming from government websites, muzzled government scientists. According to Gallup, Trump has a 90% approval among Republicans.
You might say "Well, they approve of the other stuff he's doing even if they disagree with his climate policy".
That means that even if they care about climate in their heart of hearts, they don't care enough about it to say "disapprove" on a survey much less vote for politicians who might do something.
I find the notion that a lot of Republicans care about climate change, just not enough to say or do anything about it kind of uncompelling.