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In my "Aluminium sheet rolling" process, when produce 1kg sheet, come out 0.40747kg aluminum scrap, and the scrap link to a treatment process. 

But when I calculate the "Aluminium sheet rolling" process, the treatment process causes no carbon footprint.

And I have tried to calculate the treatment process directly, I got the result as below.

I don't know why the carbon footprint of treatment doesn't contribute to the "Aluminium sheet rolling" now. It means it used to be, but I don't know what have changed.

By the way the LCIA method I use always the same.

in openLCA by (170 points)

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