I’ve always wanted to release a million balloons at the base of tower! How many birds do you think those things kill? I’d also like to know how much water they use. The output of a dirty solar panel can drop 20-30%, I would assume it would be similar for those mirrors and they are located in an extremely dusty locations, so will need to bee cleaned very often. Not to mention the maintenance on the steam generator with all the thermal cycling, they must have cracking issues.