Most liberal types are de facto global warming deniers because they don’t have that much better an understanding of science than the real deniers.
They think that things will continue mostly like usual, but perhaps a little worse. But that’s not likely. Not likely at all. What’s most likely is things continue as normal, get really bad for a while, then when everything is relatively salubrious again, all goes to hell and never returns to any version of normal.
Anyone under 30 or so is going to have quite a terrible life, if they aren’t just killed outright by the inevitable wars, famines, and resource contention.