GHG Protocol (Greenhouse Gas Protocol)

The most widely used set of standards for measuring greenhouse gas emissions.

It defines Scope 1, 2 and 3 and underpins ISSB, ESRS and California SB 253.

Find providers and guides

• GHG Protocol providers
• Carbon accounting and emissions management

Related terms

• Scope 1 emissions
• Scope 2 emissions
• Scope 3 emissions

Guides

• How to collect Scope 3 data from suppliers
• Scope 1, 2 and 3 emissions explained, with examples
• Best carbon accounting software in 2026: how to shortlist and compare

← All ESG terms

Reviewed 14 October 2026. General information, not legal advice.