Climate change denial seems to be a generational thing.
When I was growing up, environmentalism meant conservationism. Mowing your lawn and not littering were ways to particpate.
Then people started talking about acid rain, eutrophication of the great lakes and the ozone layer. It was counter-culture, clearly against the industry establishment. Youth supported these initiatives for awareness and change. Those that didn't, weren't an organized opposition. Industries reduced sulpherous emisions, successfully addressing the dead lakes and dead trees from acid rain. Sulphates in soaps were controlled, bringing back Lake Erie from being a stew of algae. Chloroflorcarbons were controlled to address the ozone layer.
Then came the next generation. Global warming became a more serious issue, atmospheric carbon dioxide being observed as the cause. It wasn't as localized as the other issues, and not as easy to address as the ozone issues. Environmentalism was mainstream. Suddenly being anti-environmentalist was the "alternative". "open your eyes" was the call to action "big environment money" was the real cause. Supporting environmentalism was supporting the mainstream government.
The environmental movement was successful because it achieved results on a global scale. Not because it's part of a big moneyed establishment conspiracy. It's embarrassing to be on a site with so many of these anti-environmental twits.
Sometimes I think the only way to get them on-board is to make environmentalism look like some alternative viewpoint being suppressed by a self-serving government conspiracy. Like starting stories that the government is taxing hard-working people, subsidizing oil and gas to increase atmospheric carbon so that real-estate speculators can get a windfall return on investments in the Ozarks.
Beating these people over the head with mainstream movies? it only supports the "big environment" theory.