The technology for metal processing exists. Sweden has demonstrated fossil fuel free steel production, from processing the ore to iron and then on to steel. A commercial plant is under construction.
HYBRIT: Six years of research paves the way for fossil-free iron and steel production on an industrial scale - Hybrit
The HYBRIT initiative now presents the results of six years of research in a final report to the Swedish Energy Agency. The report shows that direct reduced iron produced with the HYBRIT process has superior characteristics compared to iron produced with fossil fuels. HYBRIT has applied for and received several patents based on the successful ...
Hybrit (www.hybritdevelopment.se)
Most other metals can similarly be produced with effectively zero CO2 emissions.
I would agree that cement is a bigger problem but the science is progressing.
