OK. I'll take your word for it but I have been around smelting Iron, Steel, and Aluminum plants and they kick out a significant amount of dangerous chemicals themselves.
Ore is usually loaded with impurities that need to be removed. This impurities include mixtures of natural lanthanides, rare earth minerals, sulphur, etc. etc.
If this is the primary reason why Aluminum is considered "eco-friendly" over plastic and yet it takes more energy to manufacture and recycle aluminum, then it seems to me that we should work on better filters for manufacturing plants to clean up the emissions.
Sorry, I didn't mean to get this thread so far off topic. I am done.
aluminum wasnt that environmental friendly untill recent years becuase of a new protective chromium coating that makes it environmental friendly.
however Aluminum cannot be destroyed in the environment, it can only change its form.