It means climate-change fiction — stories about the world after a climate catastrophe, stories that used to be called science fiction.

To make predictions based on the present could be an act of climate catastrophe denial, an act that recursively makes the catastrophe more likely.

Will humanity be doomed by climate catastrophe?

You do not need to believe in the science of climate catastrophe to realise that responsible husbandry of the planet's resources makes sense - especially with such a rapidly growing population.

But the idea of using millions of buckets of whitewash to avert climate catastrophe has won the backing of one of the world's most influential scientists.