# Biosynthetic butadiene

Upstream — fermentation & cell culture — Renewable production routes to 1,3-butadiene — the C4 monomer for synthetic rubber and ABS plastics — via two competing chemistries: catalytic conversion of bioethanol to butadiene, and gas fermentation of methane.

Source: https://en.bioecon.ru/market/upstream/biosynthetic-butadiene/