Ken Caldiera has come up with a nice reversal of the “does it make sense to spend money fighting climate change” question:
“If we already had energy and transportation systems that met our needs without using the atmosphere as a waste dump for our carbon- dioxide pollution, and I told you that you could be 2% richer, but all you had to do was acidify the oceans and risk killing off coral reefs and other marine ecosystems, risk melting the ice caps with rapid sea-level rise, shifting weather patterns so that food-growing regions might not be able to produce adequate amounts of food, and so on, would you take all of that environmental risk, just to be 2% richer?”
You would have to be mad to say ‘yes.’
That re-phrasing takes advantage of the endowment effect.
Once we have something, we assign more value to keeping it than we would assign to acquiring it if we didn’t have it already.
“The first point to make is that, even if Nordhaus’ calculations [about the cost of stopping anthropogenic climate change] were reliable, the costs of climate change mitigation do not see unmanageable. As Thomas Schelling puts it:
Even Lomborg agrees with this. He not only cites the 2 percent figure with approval but adds, “there is no way that the cost [of stabilizing abatement measures] will send us to the poorhouse” (Lomborg 2001, p.323)”
Gardiner, Stephen. “Ethics and Global Climate Change” in Gardiner, Stephen et al. Climate Ethics: Essential Readings. p.11 (paperback)
That is what we are risking the entire planet for – to avoid an economic expense that people wouldn’t even notice.
Humans are dumb.