Poll: Best Cli-Fi or Climate Change Movie Climax

Cli-Fis, short for climate fiction, are an emerging sub-genre of science fiction focused on climate fiction in novels, movies and television. The genre's main manifestations are climate disaster movies and dystopian climate based movies. The genre even has it's own awards called "The Cliffies". Which Cli-Fi genre or climate change themed movie is the most climactic? Discuss the topic here.