Most aluminium from Macbooks is recycled either at recycling plants or by Apple themselves (see previous article on the site), whereas plastics such as in other laptops often cannot be recycled.
In addition, you are working from the assumption that aluminium processing is more electricity intensive, whereas you have no idea of the amount of electricity and water needed to produce and mold plastic. If you want to make a well founded argument that Apple's production process is worse for the environment than say Lenovo, than please try harder and present us with some facts in stead of high school level knowledge of aluminium processing.
I'm not talking of end of life for the product, but the manufacturing.
I'm not comparing Lenovo or any other company other than Apple as they are the Company beating their green chest.
A mac book pro billet gets 90+ percent of the billet milled off, of course they recycle the waste, they're not stupid, but it does take extra energy to produce this compared to a cast body. I know casting is less desirable, but if it uses less energy, it would better environmentally right? Isn't this what the advert alludes to? Finding processes that are more energy efficient.
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