Ever spent time in Dubai airport, on the shores of the Persian Gulf? You might have reflected that human beings can live quite well when temperatures exceed 50°C. All they need to do is stay behind plate glass, with the air conditioning on maximum.
No doubt you looked out through the glass at the dust and sand. If you’re unusually reflective, you might then have asked yourself: if this is what global warming has in store for huge stretches of the Earth, what’s everyone going to eat?