That's because very few people are being meaningfully affected right now. For most, climate change exists as an abstract idea and not an immediate, physical problem. It doesn't help that claims like those made by Al Gore about the polar ice caps being gone by 2016 turned out to be untrue.
I wouldn't expect society to transform itself if told that an asteroid may impact Earth in eighty years, for similar reasons.
I wouldn't expect society to transform itself if told that an asteroid may impact Earth in eighty years, for similar reasons.