We are One Carbon World.
Make your next climate step with confidence.
We help organisations measure and verify greenhouse gas emissions, set targets, meet reporting requirements and develop practical climate strategies, with specialist support across value chains, FLAG, carbon removals and nature-based solutions.
Proud to partner with:








Where do you want to start?
What brings you here?
Choose the area that’s most relevant to you, and we’ll guide you to the right next step.
We need to understand our emissions or supply chain
Measure your organisation’s corporate or product greenhouse gas emissions, map your value chain and identify reduction opportunities.

We need independent assurance or verification
Get third-party assurance and verification of your existing greenhouse gas inventories or disclosures.

We need support with nature, forestry or agriculture
Get specialist help with nature-based solutions, Forest, Land and Agriculture (FLAG) emissions and removals, and related value-chain impacts. Develop nature-based and carbon removal projects, with support for project design, MRV and registry requirements.

We need support with climate claim readiness and targets
Understand and meet reporting requirements, such as ESOS and SECR, strengthen your disclosures including CDP, set science-based targets through SBTi, and develop a practical compliance strategy.

How OCW helps
Technical expertise. Practical support.
From a defined project to an ongoing partnership, we help organisations measure, verify, report and reduce greenhouse gas emissions.
Client experience
Working with organisations across sectors.






















One Carbon World at the UN
Did you know One Carbon World wrote the
official sustainability report for COP27?
COP27

Official sustainability report and emissions verification.
COP28

International Climate Positive Award.
COP29

Partnerships and business collaboration.
COP30
In-person and online participation; UK COP30 Pavilion showcase.
COP31

Update coming soon.

