This was explained well to me at one point. Regardless of all these cause and effect arguments about proper temperature and scientific consensus, there is a simple way to look at it.
We can either (1) try to do something about the climate change that jeopardizes human life, or (2) not do anything about it at all. There are pros and cons to doing something about it, that will or will not materialize whether we act or not.
Pros -
- Expend resources to invent new technology. Even if earth's climate change cannot be undone, surely science and technology would benefit from the research.
- Possibly save human life.
Cons -
- High cost of combating climate change might lead to economic depression.
- Resources / investment that could have been spent on something else are spent on climate instead.
So we get the following 4-options:
(1)(a) try to do something about climate change, and it turns out to be the right thing to do.
- save human life, invent new technology through research, however it will come at a high cost and might temporarily set back the economy.
(1)(b) try to do something about climate change, and it turns out to be the wrong thing to do.
- invent new technology through research, however it will come at a high cost and might temporarily set back the economy, and would divert resources / investment from other projects.
(2)(a) not do anything at all, and it turns out global climate change was real and solvable
- humans die; drought and famine cause mass starvation, displacement, and refugees; economy ruined amid mass poverty.
(2)(b) not do anything at all, and it turns out global climate change wasn't real
- human life continues, we invest in other projects and research, economy keeps going as it's going now.
I think it's pretty obvious that option (2)(a) is the worst possible outcome. Option (2)(b) is good. Although option (1)(b) is kind of bad, it's not as bad as option (2)(a). Option (1)(a) is pretty good. I think this shows that going something about climate change (option (1) above), on balance, is the better option. Which is worse? Which is the greater risk? Option (2)(a), or option (1)(b)?
Regardless of whether you "believe" the science of not, the question you should be asking is this:
Am I willing to take the risk that it's real and we do nothing, when doing something about it and being wrong isn't that bad?