No luck finding the 644 missing pounds but I do note that the PDF version of the document (I assume the original) reports the steel figure as 23,101,000 instead

No luck finding the 644 missing pounds but I do note that the PDF version of the document (I assume the original) reports the steel figure as 23,101,000 instead of 28,101,000 . That however seems to be a typo that was fixed later. I'm guesses the missing 644 pounds is platinum. Several articles on Liam talk about the metal but it is not included in the list, presumably for space reasons. http://images.apple.com/environment/pdf/Apple_Environmental_Responsibility_Report_2016.pdf http://images.apple.com/environment/pdf/Apple_Environmental_...