Some Ideas that Occurred to me That could Work

I know that this may seem far fetched, but maybe instead of burning coal, we could use animal feces. We wouldn't end up depriving plants of their deserving food, because not everyone uses feces to feed their plants. Another far fetched idea could be to use recycled newspaper to put in the center of doors rather than metal, because newspaper is a better insulator than metal. Or paint buildings white for in the summer to help keep the heat off and have black tarps to use in the winter that cover your roof.