The answer to the question:
What should we do about climate change?
depends on another question:
How should we think about this?
Keep in mind the Inevitability of Unintended Consequences.
We can assume our more intelligent leaders (we must assume there are some) choise to remain wary and knowingly ignorant, since we never know what these are.
So this must be a journey.
How do we get eight billion to go on a journey?
The road we must take to deal with climate change is somewhat obvious.
So where is the on-ramp?