Stock hedges, home insurance, and our misunderstanding of risk

There is no insurance policy that will protect us against catastrophic climate change. We cannot get our habitable climate back on any time scale that matters to humans once it’s gone. The insurance policy is us, that is, changes in our behavior and our technology done quickly enough to matter. There is no other hedge that will help us.

The more uncertain we are, the more careful we should be

It is a staple of apologists for the chemical and fossil fuel industries to say, "We have no proof that what you are talking about is dangerous." Let me restate that in probabilistic terms: "We are highly uncertain about the harm of what you are talking about."