“To protect future generations, our legal systems urgently need extension. They should measures to protect future generations. Exactly what penalties should be applied in what situation is a question beyond my expertise. I have no expertise in international law or criminal law.

But I can imagine that it might be legitimate to consider the question of the death penalty in such discussions – at least as an extreme with which other more moderate penalties can be compared.

It might also be interesting to consider the power of different kinds of penalties as deterrents. The primary aim should not be to punish a small number of individuals (in the sense of exacting revenge). The primary aim should be to prevent serious consequences for a very large number.”

Richard Parncutt, “Death Penalty for Global Warming Deniers?” revised version, 25 Dec 2012