ITT : People who think they know more than over 95% of respected scientists qualified on the subject who all agree that climate change is occurring, with only a tiny minority (usually funded by oil companies) disagreeing being hilariously portrayed as some 50/50 debate.
As stated above, it's climate change - warming & cooling occurs at different parts of the world - with average temperatures increasing/decreasing pendent on the area, usually resulting in disastrous changes for local communities mostly in the developing world reliant on a stable ecosystem for sustenance farming.
That's ignoring the fact that climate change is only one aspect of pollution which needs addressing (such as air pollution, oceanic pollution, the pollution of our water supply & deforestation) - all of which are tied in closely to the same culprits responsible for climate change.