The greenhouse gas carbon dioxide (CO2):

Carbon dioxide is a colourless and odourless gas. It is a natural ingredient of ambient air. It is one of the by-products of complete combustion and is exhaled by all living beings. The combustion of fossil fuels results in additional CO2, enhancing the natural greenhouse effect.
The combustion of one litre of petrol fuel produces approx. 2,380g of CO2. One litre of diesel fuel produces approx. 2,660g of CO2.

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