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GHG Inventories

Accurate, defensible, and transparent GHG inventories are the cornerstone of a corporate ESG program. ALG staff have a deep understanding of the engineering and process data that drive these inventories and can help you assemble a robust inventory to support your ESG planning goals.

What Does a GHG Inventory Include?

Greenhouse gas emissions characterized as part of the climate-risk evaluation and reduction process are separated into three categories, termed Scope 1, Scope 2, and Scope 3.


  • Scope 1 emissions come directly from an industrial process.

  • Scope 2 emissions are attributed to purchased electricity, steam, heating, and/or cooling, which may be generated onsite or off-site.

  • Scope 3 emissions occur outside of organization boundaries and include emissions from upstream and downstream activities resulting from a business’s activities.



These inventory categories may or may not be physically distinct from one another.

Scope 1, Scope 2, and Scope 3 Emissions
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