Basically the science says we will transition to a zero-emission society. We can either plan for it and have a managed transition, or we can be forced into it by external forces, essentially a collapse (good luck feeding 10 billion people with widespread crop failures).
The earlier we start, the smoother the transition will be. That is basically what all the protests are about, people just want to start the transition already.
But in the case of QM, either the crazy stuff is wrong- repeated experiments falsify it, no gadget can be built on the principle; or it is "not even wrong", i.e., irrelevant. But many of the climate change findings are either predictions with a timespan of several years or decades, or historical explanations (this and this happened because of climate change). The first type can only be put to test years from now, the second type never.
People say crazy things about quantum mechanics too, but we keep building and programming microprocessors according to the science as we understand it. And they work!
Anthropogenic climate change affords itself to a wide variety of crazy statements because it arises from, and affects such a wide variety of human activities. Basically, there is no segment of the human population that will remain unaffected in some way--either directly, by sea level rise or shifts in fresh water, or indirectly, by all the people who are being directly affected.
Because it is physically real, it can't be ignored forever. I fear that the longer we go as a society without addressing it, the higher the general level of social anxiety will rise. That could go a bad way: more and more people seize upon conspiracy theories or tune out. I hope instead we find the collective will to face our fears and take action to address them. I hope that like starting a difficult and scary project, once we see signs of progress, it will become easier to conceive of further progress.