Lots of folks in the US claim that there is no difference between Democrats and Republicans.  In some ways, this tends to be mostly true (look at the bipartisan lack of any serious crackdown on the financial industry, not matter what they do).  As for climate change - not just policy details, but actually even admitting it's a thing - there is a difference, especially when looking at Presidential candidates.  It's basically a choice between the current three Dem candidates, who know it's a thing, and the umpteen Republicans, who start with a little shoulder shrug and go towards lunatic denial from there.