Such innovations reduce production waste but do not alter the number of products manufactured [color=red]nor the waste generated from their use and discard; indeed, most companies invest in ecoefficiency improvements in order to increase profits and growth.
Is this sentence correct?
Yes.
I know “nither-------nor” structure. But here “nor” is used along. Why?
Such innovations reduce production waste but [color=red]do not alter the number of products manufactured nor the waste generated from their use and discard; indeed, most companies invest in ecoefficiency improvements in order to increase profits and growth.
What is the meaning of the red part?
In this case “nor” pairs up with “not” rather than with “neither”.
The meaning is essentially the same as “… alter neither the number of products manufactured nor the waste generated …” (the nuance may be slightly different).