As long as there are political donations pouring into Republican coffers from dirty industries like coal and oil, they will never admit to the truth about global warming and the climate change it is causing.
But it's more than just the money. Republicans don't like facts. They make shit up to help their rich friends like the Koch brothers. They lie and cheat to get their way because there's money in it, sure, but they also distort the truth because they're ignorant victims of their own propaganda machine. They've created a monster in their own evolution/global warming/you name the issue bullshit spewing machine and now they can't disentangle themselves from it.
"Republicans are the only major political party in the world that rejects this mainstream climate science. The right-of-center parties controlling governments in Britain, Germany and France, for example, not only embrace mainstream climate science, they support far more aggressive climate policies than anything advocated by Republicans — or Democrats — in Washington."
- Climate change: GOP Galileo moment - POLITICO.com Print View (view on Google Sidewiki)