How to calculate emissions from activity data: factors, units and GWPs, worked through
Emissions are activity data multiplied by an emission factor — litres of diesel, kilowatt-hours or tonnes of material times the kilograms of greenhouse gas each unit releases — with every gas converted to CO₂e using one set of global warming potentials. Common errors come from units, from a factor that does not fit the activity, and from not recording which factor was used.
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