We must give them more efficient combustion, carbon capture and storage, and pay the difference.

Diesel engines have a more efficient combustion process that produces 30-50 per cent better fuel consumption than a petrol engine.

This forces combustion gases from the front of the furnace to flow further, back over the rest of the furnace, encouraging efficient combustion.

That energy powers a fan for more efficient combustion and can be used to charge small portable electronics.

These advances allow higher compression ratios and turbine inlet temperatures, more efficient combustion and better cooling of engine parts.