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What is Mobile Combustion?

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Written by Gemma - Plan A Support
Updated over a year ago

Mobile combustion emissions emerge from burning fossil fuels in your company's owned or operated vehicles used to transport people and materials for the company. Typical sources of mobile combustion emissions are company vehicles and trucks as well as mobile types of machinery such as forklifts or construction equipment.

Many of your company-owned vehicles are probably used for business travel and/or commuting. Note that in this case, you should not add those trips again to the sections on Business Travel and Employee Commute, to avoid double counting. Also note that emissions from electric vehicles are categorised under Scope 2, Purchased Electricity, and not Scope 1, Mobile Combustion. Here’s an example to make this clearer:

Type of Vehicle

Used for…

Where to include it for Carbon Accounting

Company-operated Combustion Engine Vehicle

Business Travel

Company-operated Electric Vehicle

Business Travel

Company-operated Hybrid Vehicle

Business Travel

Private or Third-Party vehicle

Business Travel

Company-operated Combustion Engine Vehicle

Commuting

Company-operated Electric Vehicle

Commuting

Company-operated Hybrid Vehicle

Commuting

Private Vehicle

Commuting

Vehicle which your company leases out externally

Use by customers/lessees

To calculate your mobile combustion emissions you will ideally need consumption data on the amount of fossil fuels burnt (in litres), although alternative calculation methods are available.

Note on Leased Vehicles: Vehicles that are leased by your company to be used by employees can be treated as a normal company-operated vehicle and thus follow the same logic as the rows describe in the table above.

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