“Climate change is, at its root, a tragedy of the commons. We can only fix it by working together, and working together typically implies government legislation,” Hayhoe says.

“The true threat, however, is the delusion that our opinion of science somehow alters its reality. If we say we don’t believe in gravity and we step off the cliff, we’re still going down. Sea level will rise regardless of any legislation we may pass, and the climate is changing no matter how many politicians say it isn’t.”

Social media corporations such as Facebook facilitate and even enable the tribalism and cultural polarisation, Hayhoe adds, that “lie at the root of so many of our problems today.”