Some survivors of the Indian heat wave become ecoterrorists and use swarms of drones to crash passenger planes; no one can figure out how to stop the drones, and everyone gets scared. People fly less. They teleconference, or take long-distance trains, or even sail. They work remotely on transatlantic crossings. It’s not how we want change to happen. But, in the end, the jet age turns out to have been just that — an age.”