Multiple life-cycle assessment and circular bioeconomy studies indicate that utilizing process leftovers and agricultural by-products for animal and livestock feed reduces greenhouse gas emissions, with certain pathways like biochar integration offering potential negative emissions.
The retrieved papers include studies showing that incorporating process leftovers and by-products into animal feed reduces the carbon footprint (Paper 1), that insect bioconversion of waste creates sustainable feed components (Paper 2), and that biochar derived from residues can be used as a feed additive to achieve carbon sequestration and negative emissions (Paper 0). None of the provided papers refute the claim.