There is definitely something to the Bulletin's damning assessment of computing technology's environmental impact. And BTC's 100% proof-of-work blockchain does basically amount to manufacturing money by lighting stuff on fire. But steemit's 'graphene' blockchain functions differently (it uses proof-of-stake) and does not require nearly as much energy. Incidentally, ETH seems to be planning to switch to (some mysteriously complex) proof-of-stake mining in the near future.

My suspicion is that there's no magic bullet which could solve all of these problems. But there are huge advances in material science, nanotech, biotech, and int'l business happening at a fairly steady clip. So my thinking is that a diverse array of highly localized solutions to these problems will be rolled out all over the world in the next 5-10 years, and (probably after a couple of major wars) we will get a decent handle on minimizing the environmental impacts of computing technologies about the time the global climate goes really haywire as a result of the stuff that has already happened.