Examples would be shorting Florida coastal real estate, shorting flood insurance, long on agricultural and real estate investments that depend on moving growing zones and seasons, etc..
The most undeniable evidence for climate change would be if people are making a ton of money from accurately anticipating its results. I’d invest heavily in such a fund, if it existed.
One cool thing about this is that if you don’t believe in climate change you would want this too - you should bet against the fund and take the money of people like myself if you are right. Since I believe climate change is real, I would happily put my money on the other side of that bet.