One widely-used framework for measuring emissions is the Greenhouse Gas Protocol, which categorizes emissions into three different scopes: Scopes 1, 2, and 3.

Scopes 1, 2, and 3 were created by the Greenhouse Gas Protocol, which is a widely-used standard for greenhouse gas accounting and reporting. The Greenhouse Gas Protocol was developed by the World Resources Institute and the World Business Council for Sustainable Development to provide a consistent and transparent way for organizations to measure and report their greenhouse gas emissions.

The use of Scopes 1, 2, and 3 is not enforced by any regulatory body. However, many organizations voluntarily adopt the Greenhouse Gas Protocol and report their emissions to demonstrate their commitment to sustainability and to meet the expectations of stakeholders such as customers, investors, and regulators.

In some cases, governments may require companies to report their greenhouse gas emissions as part of mandatory reporting schemes or to comply with regulatory requirements such as emissions reduction targets or carbon taxes. In these cases, the use of Scopes 1, 2, and 3 may be mandated by law or regulation.

Understanding these different scopes can help organizations better understand their emissions profile and identify opportunities to reduce their environmental impact.

Scope 1 Emissions

Scope 1 emissions refer to direct emissions from sources that are owned or controlled by the reporting entity. This includes emissions from combustion of fossil fuels in boilers, furnaces, or vehicles, as well as emissions from chemical processes or other industrial processes. Scope 1 emissions are often the easiest to measure and control, since they are generated on-site and can be directly attributed to the reporting entity.

Examples of Scope 1 emissions include:

Emissions from fuel combustion in boilers, furnaces, and other equipment
Emissions from on-site transportation, such as company-owned vehicles
Emissions from chemical processes, such as those used in manufacturing or industrial processes

Scope 2 Emissions

Scope 2 emissions refer to indirect emissions that are associated with the consumption of purchased electricity, heat, or steam. These emissions occur at the facility that generates the purchased energy, rather than at the reporting entity's own facilities. Scope 2 emissions are often generated by utilities or other energy providers, and are typically measured in terms of the amount of electricity, heat, or steam that is consumed by the reporting entity.

Examples of Scope 2 emissions include:

Emissions from the production of purchased electricity, heat, or steam
Emissions from transmission and distribution of purchased energy
Emissions from purchased energy used for transportation or other purposes

Scope 3 Emissions

Scope 3 emissions refer to all other indirect emissions that are associated with the activities of the reporting entity, but occur from sources that are not owned or controlled by the reporting entity. These emissions are often the largest and most complex part of a company's carbon footprint because they involve emissions from the entire value chain of a product or service. This includes emissions from suppliers, customers, and other stakeholders across the product's lifecycle.

Examples of Scope 3 emissions include:

Emissions from the production of raw materials used in products or services
Emissions from transportation of goods and employees
Emissions from waste disposal and recycling
Emissions from the use of products or services by customers

Why Scopes 1, 2, and 3 Matter

Understanding the different types of emissions in Scopes 1, 2, and 3 is important for several reasons. First, it allows organizations to identify the sources of their emissions and prioritize actions to reduce them. For example, if a company has a large amount of Scope 1 emissions from fuel combustion, it may choose to invest in more energy-efficient equipment or switch to renewable energy sources. If a company has a large amount of Scope 3 emissions from its supply chain, it may choose to work with suppliers to reduce emissions or to source materials from more sustainable sources.

Second, measuring and reporting emissions in accordance with the Greenhouse Gas Protocol can help organizations demonstrate their commitment to sustainability and transparency. Many stakeholders, including customers, investors, and regulators, are increasingly interested in the environmental impact of the organizations they work with or invest in, and greenhouse gas emissions are an important metric of that impact.

Finally, understanding Scopes 1, 2, and 3 can help organizations prepare for future regulatory requirements or market pressures related to climate change. As governments and other organizations take action to address climate change, there