This sounds way too alarmist to me:

"You get these contrails from the jets. The rate at which they're expanding in terms of their fractional cover of the stratosphere is so large that if predictions are right, in 40 years it won't be worth having telescopes on Earth anymore - it's that soon.

"You either give up your cheap trips to Majorca, or you give up astronomy. You can't do both."

Now, I'm hardly an astronomer, but - isn't light pollution as big a problem here? I know that I have a lot more trouble seeing the sky where I live now (suburban Maryland) than where I grew up in New York State.