I can't wait until they makes these no cost, low-maintenance, and self-replacing. Oh man, just think of how easy it would be to fix our climate issues!
When fossil fuels are out of the equation, civilization will have to learn to live on a roughly 3 to 1 EROEI as opposed to the 100:1 of the prewar period and the roughly 20:1 today.
Your surplus energy decides your civilizational metabolic rate and is a key pillar of what is possible. Are we building shit like this at 3:1? What are we giving up for it?