> No serious climate scientist thinks we are going to fall off a cliff. It's not a literal cliff. Doctorow was using a metaphor. And they're never exact fits,

> No serious climate scientist thinks we are going to fall off a cliff. It's not a literal cliff. Doctorow was using a metaphor. And they're never exact fits, they are loosely analogous. He probably chose a bus in an attempt to make the trolley problem more current and approachable.