Protesters have blocked construction of a new runway at Heathrow Airport since 2010. Now government agents are trying to forcibly remove them.

I would not sympathize much with these protests if it were just a matter of NIMBY. However, the whole world is threatened by increases in flying and the consequent greenhouse gas emission. Although new planes are maybe 15% more fuel-efficient than those made 20 years ago, that would only compensate for a 15% increase in flying across 20 years, and only if all the old planes were replaced.