Liberals have always believed in free market capitalism.
Man made global warming is not an end times prophesy, it's a scientific theory.
And the goal of this theory is not to bring about the end times but to evert human extinction and suffering.
Now the science might be wrong. The question is simple, does the cost of doing nothing outweigh the benefits.
The economics of Free market capitalism sais that ones here are advantages to cutting carbon even if the theory is wrong by which we will benifit non the less.
So from an economics point of view it really is a win win for acting as if global warming is man made, hike it's a loose, loose if we pretend it isn't real and find out we have crossed a tipping point to anialation