Scope 1 emissions are emissions from sources owned or controlled by a reporting entity. For example, emissions from equipment, a vehicle or production processes that are owned or controlled by the reporting entity are considered Scope 1 emissions. These emissions include all direct emissions within the entity’s inventory boundary.
The combination of organizational and operational boundaries make up a reporting entity’s inventory boundary, which is also called the reporting boundary. Refer to Organizational boundaries for information on organizational boundaries and Operational boundaries for information on operational boundaries.
The GHG Protocol is designed to avoid double counting GHG emissions. That is, two or more reporting entities should never account for the same emissions as Scope 1 emissions. For example, emissions from the generation of heat, electricity or stream that is sold to another entity are not subtracted from Scope 1 emissions but are reported as Scope 2 emissions by the entity that purchases the related energy.
Theoretically, if every entity and individual throughout the world reported their GHG emissions using the same organizational boundary (e.g., equity share, financial control or operational control approach), the total of all Scope 1 emissions would equal the total GHGs emitted throughout the world.
Types of Scope 1 emissions
The GHG Protocol describes four types of Scope 1 emissions: stationary combustion, mobile combustion, process emissions and fugitive emissions. The type of emissions that are included in Scope 1 will vary based on the industry and business model of the reporting entity.