Carbon Dioxide Facts:

• The generation of 1 kWh of electricity from a coal-fired power station produces 1 kg of CO₂
  
  
• The burning of 1 therm of natural gas produces 6 kg of CO₂
  
  
• The combustion of 1 litre of petrol produces around 2.5kg of CO₂
  
  
• For the same amount of useful energy, oil emits 38-43% more CO₂ than natural gas, and coal emits 72-95% more.