a special mirror for the world - melting copper with sunlight - tamera free lab - daywalker e28 

@Sen Se That's not a bad idea. Actually, more research should be done whether it's more efficient to focus the wind or focus the sunlight, but I would imagine that depends on location. Does the location have more sunlight or more wind? Also, which one is safer? And, is that the right approach versus thinking in terms of more decentralisation? If you drive between any 2 big cities, what do you see? A lot of empty space. The occasional huge wind turbine seems very expensive and dangerous. Instead of having one big turbine, how about thousands of smaller ones that would be only say 4 m high? That way they would be easy to service, easy to set up, and you can still grow crops underneath them. Each of them could be outfitted with an automatic parasol that would fold out with solar panels on it that would provide some shade to the plants beneath it when necessary.

hi! when i left in october it was still the old one heating the pots directly!