The problem is people are still trying to convince the deniers that there is a problem.
All this does is increase the radicalization of the deniers. The Deniers will not believe any logic or proof that you tell them. Because...
1. They don't want to believe it. Any logic your bring up is part of a conspiracy.
2. It is inconvenient to believe it. AKA they have a lot of money in industry that profits off of releasing global warming gasses.
3. Their religion/philosophy/political view has chosen to not to believe it. Not form any religious text per say but because of a charismatic Person for #1 or #2 who has manipulated the text. It isn't because all these people are just brain dead followers... But because they are in a situation in their lives where they have learned growing up that they are good guys and bad guys. And the bad guys are obviously wrong, or corrupt.
Now there are liberal agenda items that are not backed by science however they will firmly deny them as well, so it isn't that the other group is that stupid, but it is due to the human condition.
To correct climate change, We need to stop trying to convince the deniers about the problem, they won't listen. But you need to create solutions where alternatives are available.
For example don't mention green.
1. It is cheaper.
2. You have more control of your power and you are not as dependent on someone else.
3. Jobs available in a new energy market.
You need to get the tree huger/I HATE AMERICA type cast from the issue. That way you can sneak it into their culture without them having to really believe in global warming.