The GHG Protocol Corporate Standard classifies a company’s GHG emissions into three ‘scopes’.
Scope 1 emissions are direct emissions from owned or controlled sources.
- Stationary Combustion: Stationary fuel combustion emission sources are typically devices that combust solid, liquid, or gaseous fuel, generally for the purposes of producing electricity, generating steam, or heat.
- Company Vehicles: Refer to a wide variety of company-owned or operated vehicles, engines, and equipment that generate GHG emissions through the combustion of various fuels while moving from one location to another.
- Refrigerants: Fugitive emissions from refrigeration and air conditioning result from leakage and service over the operational life of the equipment and from disposal at the end of the useful life of the equipment.
Scope 2 emissions are indirect emissions from the generation of purchased energy.
- Purchased Energy: These are considered indirect emissions sources because they are a consequence of activities of the reporting organization, but occur at sources owned and controlled by an outside entity (i.e. an electricity utility).
Scope 3 emissions are all indirect emissions (not included in scope 1and scope 2) that occur in the value chain of the reporting company, including both upstream and downstream emissions.
- Purchased Goods and Services: This includes all upstream (i.e., cradle-to-gate) emissions from the production of products purchased or acquired by the reporting company in the reporting year. Products include both goods (tangible products) and services (intangible products).
- Employee Commuting: This includes emissions from the transportation of employees between their homes and their worksites. Companies may include emissions from teleworking (i.e., employees working remotely) in this category.
- Business Travel: This includes emissions from the transportation of employees for business-related activities in vehicles owned or operated by third parties, such as aircraft, trains, buses, and passenger cars.
- Waste Generated in Operations: This is related to emissions from third-party disposal and treatment of waste generated in the reporting company’s owned or controlled operations in the reporting year. This category includes emissions from the disposal of both solid waste and wastewater.