Solutions
In heavy industry, almost every tonne of CO₂ traces back to energy or a chemical reaction you can influence. These are the levers that matter — grouped by sector, with the reduction and the cost case side by side.
01 · Chemical & process
Energy-intensive, heat-driven and often decades old. The biggest wins come from moving heat smarter and running electrochemistry tighter.
Recover heat between hot and cold streams across distillation, evaporation and drying trains before it goes to cooling water. Often the single largest fuel saving in a chemical plant.
Lever: fuel & steamMembrane condition, current density and cell voltage decide power draw per tonne in electrochemical plants. Small efficiency gains compound across a cell room.
Lever: Scope 2 powerReaction exotherms and by-product hydrogen are free energy if captured — for steam, preheat, or on-site power instead of flaring or venting.
Lever: fuel offsetSteam-trap surveys, VFDs on pumps and fans, compressed-air leak repair and power-factor correction. Unglamorous, fast payback, quantifiable.
Lever: power & steamRenewable PPAs and green-hydrogen feedstock cut the Scope 2 and Scope 1 numbers that compliance actually charges for.
Lever: emission factorClean measurement, a defensible emissions baseline and an intensity trajectory that keeps you under your CCTS target — not scrambling at the filing deadline.
Lever: compliance02 · Steel & metals
Steel's emissions are dominated by how iron is reduced. The route decides most of the footprint before efficiency even enters the picture.
Scrap-fed electric arc furnaces emit a fraction of blast-furnace / basic-oxygen steel. Raising scrap share is the highest-leverage single decision most mills have.
Lever: process routeDirect reduced iron on green hydrogen replaces coking coal as the reductant. Long-horizon, but planning and pilots start now.
Lever: reductantRecuperative/regenerative burners, recovered blast-furnace and coke-oven gas, and tuned combustion trim energy per tonne rolled.
Lever: fuel efficiencySteel is inside the EU CBAM. Exporters need verified embedded-emissions data now, or they pay on default values with a mark-up.
Lever: trade cost03 · Cement & heavy industry
Here a large share of CO₂ isn't from fuel at all — it's released chemically when limestone is calcined. That changes the playbook.
Replacing clinker with fly ash, slag or calcined clay (LC3) cuts both process and fuel emissions per tonne of cement — the most mature lever in the sector.
Lever: process CO₂Biomass, refuse-derived fuel and other wastes displace coal and petcoke in the kiln, lowering the fuel share of emissions.
Lever: fuel mixPreheater/precalciner optimisation plus waste-heat recovery generation turns exhaust heat into on-site electricity.
Lever: energyThe calcination CO₂ can't be efficiency'd away — for deep cuts it must eventually be captured. Worth mapping the pathway early.
Lever: residual CO₂Same levers, different pressure
Start where it's cheapest to start