The Integrated Guide for Business Greenhouse Gas and Air Pollutant Emission Assessment, or Guide 2.0, updates the 2022 Practical Guide. Developed in collaboration with the SEI at the University of York, the Climate and Clean Air Coalition, the Clean Air Fund, and other partners, this initiative helps businesses quantify greenhouse gases, short-lived climate pollutants, and heavy metals across their value chains.
The 2025 Integrated Guide for Business Greenhouse Gas and Air Pollutant Emission Assessment, also known as Guide 2.0, is an updated version of the 2022 Practical Guide for Business: Air Pollutant Emission Assessment. Launched during London Climate Action Week 2025, this guide helps businesses of all sizes quantify greenhouse gases, short-lived climate pollutants (SLCPs), air pollutants, and heavy metals throughout their value chains.
Guide 2.0 offers practical methods and emission factors for creating integrated emissions inventories. This supports mitigation strategies that tackle both climate change and air quality goals. Key updates include the addition of carbon dioxide (CO₂), methane (CH₄), and heavy metals, along with new practical examples and revised chapters. These revisions are based on user feedback and evolving corporate reporting needs, including regulatory changes like the EU’s CSRD. Businesses can use this guide independently or to enhance existing GHG inventory systems, even without prior knowledge of the original guide.
This new edition was developed in collaboration with SEI at the University of York, with support from the Climate and Clean Air Coalition (CCAC) Trust Fund, the Clean Air Fund (CAF), and other partners. As climate change and air pollution are pressing global issues, this comprehensive resource fills a significant gap in guidance for the private sector, which contributes to emissions through various operations.
Project / The project incorporates SLCPs and other air pollutants into the GLEC Framework on emissions tracking for businesses.
Project / The project will increase the capacity of NEMA and the Uganda Ministry of Water and Environment to understand the major sources of SLCPs in the country.
Project / We provide in-depth technical support to the Alliance secretariat and corporate members on value chain air pollution emissions reductions and target setting.
Feature / Learn how SEI’s guide is aiding companies in pinpointing and curbing their air pollution footprint.
Other publication / Thirty-seven actions in five key sectors could be the key to tackling climate change and air pollution in Africa simultaneously.
Feature / On UK Clean Air Day, SEI York researchers explore the potential for UK-led initiatives to inspire and guide global policies and actions toward cleaner air.
