There are various ways to calculate carbon emissions , depending on the source and the scope of the emissions being measured.
For direct emissions from sources such as vehicles and industrial facilities, emissions can be calculated by measuring the amount of fuel consumed and using emission factors to convert that fuel consumption into a carbon dioxide equivalent (CO2e) emissions value.
For indirect emissions such as electricity consumption, emissions can be calculated by using emissions factors for the fuel source used to generate the electricity and multiplying that by the amount of electricity consumed.
For emissions from land use changes (e.g. deforestation), emissions can be calculated by estimating the amount of carbon stored in the affected vegetation before and after the land use change, and then calculating the difference.
For emissions from industrial processes and product use, emissions can be calculated using the methods described in the GHG protocol Product Life Cycle Accounting and Reporting Standard.
It is important to note that all emissions calculations should be based on internationally recognized methodologies such as the GHG Protocol Corporate Accounting and Reporting Standard or the Green house Gas Protocol Product Life Cycle Accounting and Reporting Standard.
