Do yourself a favour - plant an acorn seed and see how big a tree it gets to by the time your solar panel fails or windmill loses it's puff - both the latter ones will end up in landfill whilst the 'real green' will just keep growing and absorb much of the hot air.
BTW, I have built a cubby house for my kids it was rather large so that even adults could comfortably stay in it. Not sure if you could say that about a doggy house - perhaps one in your own backyard??
The first sign of the Dutch windmill was discovered in the 13th century. During that era, these mills harnessed the power of the wind to grind grains and mustard seeds. They were also used for processes like paper making, wood cutting, and oil pressing.
Thus, indirectly perhaps but they did generate power - these days paper mills, wood cutters and oil pressers are in the main all powered by electrical devices.
