bottom line is things need power and that need is only going to become a bigger issue as things like machine learning and cloud gaming pick up, so rather than gripe about this or that producing xxxx waste lets just focus on producing clean energy so it wont matter
bitcoin proof-of-work complexity increased 4x in 2018 alone.
no amount of renewables CAN cover this, nor should they, as it's bad design and should be phased-out for something else.
invent that "something else" and you will have done something useful.
On the other side Bitcoins biggest problem is power consumption. Which is a problem because crytpo currency doesn't add anything to society. Its just a big gambling platform. It never became the distributed money a lot of people thought it would become.