 That's according to a recent poll from Florida Atlantic University. And it matters because if you don't believe climate change is manmade, you don't believe anything you do will slow it down. And Jewett said even for voters who do believe in manmade climate change, it's still not a top election issue. I heard this firsthand at a Winn-Dixie grocery store in Key Largo, where I asked local shoppers how they view climate threats.