Complex sentence: Many industries already routinely do this, such as paper mills where any damaged rolls are returned to the beginning of the production line; also, in the manufacture of plastic items where the off-cuts and scrap are re-incorporated into new products.
Split into simpler sentences: Many industries already routinely do this, such as paper mills where any damaged rolls are: rturned to the beginning of the production line. Also in the manufacture of plastic items where: the off-cuts and scrap are re-incorporated into new products.