Closer than any heavy industry: all emissions are fuel below ~200 °C, where heat pumps, biogas and solar thermal already work. The barrier is capital sequencing, not technology.
From our guide: Decarbonizing Food processing — full context, charts and sources there.
Boilers, kilns, heat exchangers, valves and steam lines lose energy continuously. Inzonex makes patented (UK GB2508992.1) removable modular insulation — snap-fastened covers engineered per temperature tier, not generic off-the-shelf jackets: