↑   Estimates change throughout the world, but most sources provide a figure of two–4kg of bauxite for each 1kg of alumina. down and recycle. Based on the Aluminum Affiliation, just about 70 % from the aluminum at any time mined continues to be in use today, owing to successful recycling programs. https://shedsandgarages56677.angelinsblog.com/36443846/aluminium-greenhouse-things-to-know-before-you-buy