Solarpunk technology

You are right. However, with policy changes, we also need a tenable plan for a hydrogen economy that is physically and economically possible. The tech to produce and handle hydrogen on that scale does not exist, and much like carbon capture and storage, they are likely to remain a pipe dream; numbers don't add up. We've spent a century building infrastructure that has no use other than extracting and processing fossil fuels. That we have enough resources to make the transition to a clean economy is in serious doubt at this time.

It does make a nice talking point to make everyone feel better about technology saving us from ourselves in the future, though. It's certainly much more palatable than talking about the overshoot of the human population.