Scope 1

Scope 1
Name	Scope 1
Type	Direct greenhouse gas emissions category
Related	Greenhouse Gas Protocol, carbon accounting, emissions inventories

Scope 1 Scope 1 denotes direct greenhouse gas emissions from sources owned or controlled by an entity and is a foundational concept in corporate carbon accounting. It functions alongside Greenhouse Gas Protocol frameworks and informs reporting under regimes like the Paris Agreement commitments, influencing stakeholders such as the International Energy Agency, United Nations Framework Convention on Climate Change, and investors including BlackRock, Vanguard Group, and State Street Corporation.

Definition and scope

Scope 1 is defined by the Greenhouse Gas Protocol and used by organizations including the World Resources Institute and World Business Council for Sustainable Development to classify on-site emissions from assets such as facilities, vehicles, and process equipment. National regulators such as the Environmental Protection Agency and the European Environment Agency reference Scope 1 definitions when aligning reporting with laws like the U.S. Clean Air Act amendments and the EU Emissions Trading System. Corporations from ExxonMobil to Siemens apply Scope 1 accounting to quantify emissions tied directly to operations across countries like the United States, China, India, and Germany.

Sources and emission categories

Typical Scope 1 sources include stationary combustion sources found in plants owned by General Electric or Tata Steel, fugitive emissions from equipment used by Shell and BP, and mobile combustion in fleets operated by DHL, UPS, and FedEx. Process-related emissions arise in chemical facilities such as those owned by Dow Chemical and BASF, while on-site energy generation from cogeneration units at campuses like Harvard University or Stanford University also contribute. Mining operations by Rio Tinto and BHP and agricultural enterprises like Cargill report methane and nitrous oxide emissions under Scope 1.

Measurement and reporting methodologies

Measurement techniques draw on quantification guidance from the Greenhouse Gas Protocol, emissions factors published by agencies like the Intergovernmental Panel on Climate Change and the International Organization for Standardization standards (e.g., ISO 14064). Continuous emissions monitoring systems used by ArcelorMittal and Nucor complement fuel-use based calculations employed by Toyota and Ford Motor Company. Reporting platforms include disclosures to CDP (organization), filings with Securities and Exchange Commission, and voluntary frameworks promoted by the Task Force on Climate-related Financial Disclosures and the Science Based Targets initiative.

Regulatory and compliance frameworks

Scope 1 reporting is integrated into compliance architectures such as the EU Emissions Trading System, national inventories submitted under the United Nations Framework Convention on Climate Change, and cap-and-trade programs like California’s California Cap-and-Trade Program. Regulators including the Environmental Protection Agency and the Department of Energy (United States) set monitoring rules, while multilateral initiatives such as the G20 climate commitments influence corporate disclosure norms adopted by companies like Amazon (company) and Apple Inc..

Mitigation and reduction strategies

Reduction levers include fuel switching by utilities such as Enel and Iberdrola, electrification of vehicle fleets by Tesla, Inc. and BYD Company, energy efficiency retrofits implemented by Johnson Controls and Schneider Electric, and process changes in heavy industry by ArcelorMittal and Vale (company). On-site carbon capture and storage initiatives involve partnerships with Equinor and TotalEnergies, while methane leak detection and repair programs are deployed by oil and gas majors including Chevron and ConocoPhillips.

Industry-specific considerations

In power generation, operators like EDF (company) and Duke Energy contend with stationary combustion emissions and fuel mix choices. Manufacturing firms such as Boeing and Siemens focus on process emissions and efficiency of furnaces and boilers, whereas shipping lines like Maersk and MSC (Mediterranean Shipping Company) manage marine fuel combustion. Agriculture companies such as Archer Daniels Midland and Monsanto face livestock methane and fertilizer nitrous oxide, and mining firms including Glencore and Anglo American address fugitive emissions and on-site diesel use.

Criticisms and limitations

Critiques of Scope 1 accounting highlight potential underestimation of true corporate climate impacts when Scope 3 emissions associated with supply chains (involving firms like Foxconn or Foxconn Technology Group) are excluded, challenges in emission factor accuracy from sources like the Intergovernmental Panel on Climate Change, and variable enforcement across jurisdictions such as Brazil, South Africa, and Russia. Analysts at institutions like Carbon Tracker and CDP (organization) note that focus on Scope 1 can incentivize outsourcing emissions, shifting impacts to suppliers including Foxconn or POSCO rather than reducing aggregate atmospheric emissions.

Category:Greenhouse gas accounting