I think the people who deny climate change are a result of the politicization of science
Obviously the climate of the world is changing. It's a combination of natural cycles and human activity. To say it is simply one or the other is ridic, cause I've seen scientific papers for both, unless I'm mistaken? I do think people overstate the amount of damage we are doing, but also underestimate it. The polar ice caps melting will not doom the entire world, but we shouldn't be so nonchalant about losing our coastal cities.
We should strive to be more environment friendly on point of principle, but it'll be a while before we can just go full renewable. And even if we can, how space efficient can that be? I think a combination of green energy while improving what we already have available is the best bet, as well as making strides towards colonizing other planets. We should be a multiplanet species, we're smart enough for it. I think.