Conservatives are skeptical about global warming because it’s coming from the same crowd that 40 years ago claimed we were running out of trees; 30 years ago claimed we were running out of oil; 25 years ago claimed we were headed for an ice age; and 20 years ago claimed that all the ozone was being depleted. The predicted outcome of each of these was that we were all going to die - just like now with global warming.
Let’s face it - there is a significant segment of the population that is prone to Chicken-Littleism and that segment tends to skew left. Plus such fears are a great impetus for imposing more government regulation upon private enterprise.
And I’d be surprised if more than a very small minority of the conservative population actually believes the earth is only 6,000 years old.