'Factor 4' Solution: from diesel to electric trains

Diesel trains consume 460 kJ/tonne.km and emit 35 g/tonne.km. For electric trains, these figures become 230 and 9.3 respectively. The use of electric trains improves CO₂ emissions by a factor of 4, and energy consumption by a factor of 2. Another illustration of the booster effect on carbon saving through the use of electricity.