As a leading Not for Profit, we exist to enable the transition to a prosperous net zero economy

We are committed to enabling an ESG-aware net zero transition. We support you to measure, reduce and rebalance greenhouse gas emissions, helping organisations to achieve Science Based Targets (SBT), whilst simultaneously driving social and environmental impact.

Who we are

One Carbon World is a not-for-profit organisation and an official observer organisation to the United Nations Framework Convention on Climate Change (UNFCCC). We are a proud member of the UN Global Compact Network UK and are registered in the UK, supporting climate action in over 55 countries.

We provide expert advice and support to organisations of all sizes in measuring, reducing, and rebalancing greenhouse gas emissions as they transition to net zero. In addition to our internationally recognised work in carbon footprint assessment, we are leaders in developing and validating high-quality carbon removal projects, with a strong emphasis on nature-based solutions.


Our work spans carbon project creation, verification, and the delivery of solutions that help organisations achieve ambitious climate goals. We are committed to driving innovation in carbon removals and have been recognised by the European Commission as Key Innovators in the field. In recognition of our impactful approach to sustainability and net-zero leadership, we were awarded the Climate Positive Award by Green Cross UK.


At One Carbon World, we are dedicated to accelerating the global transition to net zero through practical, science-based climate action

Venezuela
10.4806
-66.9036
Uganda
0.3476
32.5825
Wales
51.4816
-3.1791
USA
38.9072
-77.0369
Uruguay
-34.9011
-56.1645
United Arab Emirates
24.4539
54.3773
Tanzania
-6.7924
39.2083
Switzerland
47.3769
8.5417
Sweden
59.3293
18.0686
South Korea
37.5665
126.978
Scotland
55.9533
-3.1883
Spain
40.4168
-3.7038
Singapore
1.3521
103.8198
Poland
52.2297
21.0122
Serbia
44.7866
20.4489
Saudi Arabia
24.7136
46.6753
Russia
55.7558
37.6176
Portugal
38.7223
-9.1393
Peru
-12.0464
-77.0428
Norway
59.9139
10.7522
New Zealand
-41.2865
174.7762
Nicaragua
12.114
-86.2362
Netherlands
52.3676
4.9041
Mozambique
-25.9655
32.5832
Monaco
43.7384
7.4246
Mexico
19.4326
-99.1332
Japan
35.6895
139.6917
Mauritius
-20.1654
57.4896
Italy
41.9028
12.4964
Indonesia
-6.2088
106.8456
Ireland
53.3498
-6.2603
India
28.6139
77.209
Honduras
14.0723
-87.1921
France
48.8566
2.3522
Guatemala
14.6349
-90.5069
Germany
52.52
13.405
Kenya
-1.2864
36.8172
Ethiopia
9.0208
38.7465
El Salvador
13.6938
-89.2345
Ecuador
-0.1807
-78.4678
England
51.5074
-0.1278
Egypt
30.0444
31.2357
Canada
43.65107
-79.347015
Denmark
55.6761
12.5683
China
39.9042
116.4074
Colombia
4.7109
-74.0721
Costa Rica
9.9281
-84.0907
Chile
-33.4489
-70.6693
Brazil
-22.9068
-43.1729
Austria
48.2082
16.3738
Argentina
-34.6037
-58.3816
Australia
-33.8688
151.2093
Belgium
50.8503
4.3517
Bulgaria
42.6977
23.3219

Our Values

Integrity
Our work is guided by principles of transparency and honesty, ensuring that ethical decision-making is at the core of all we do.​
Taking Responsibility
We take ownership of our impact and lead with courage, even when it means saying no. We engage in honest conversations and make principled choices that reflect our environmental commitments.
Kindness
We treat everyone with empathy and understanding, fostering a culture of open communication, trust, and respect.
Supportive
We provide unwavering support to our team members and partners, promoting a collaborative and diverse environment where everyone feels valued.​

Meet The OCW Leadership Team

Andrew Bowen
CEO
Hayley Warrens
Director of Land Sector and Carbon Removals
Faye O’Connor OBE
Vice President Ambassador for Nature Based Solutions
Agustin Inthamoussu
Head of Methodologies
Flora Nagyronai
Director of Operations
Madeleine Garlick
Africa Director

One Carbon World and UK Retail

One Carbon World is proud to be the carbon removal technical partner to the British Retail Consortium (BRC) — the UK’s leading trade association representing over 200 major retail businesses. Together, we are advancing climate ambition and bringing clarity to the carbon landscape through strategic collaboration.

As Chair of the BRC’s Carbon Removals Taskforce, Faye O’Connor, our Vice President of Nature Based Solutions, plays a pivotal role in guiding the industry’s understanding and uptake of high-integrity carbon removals. The Taskforce is establishing a clear, actionable roadmap for retailers and supply chains, ensuring that removals are not only credible and measurable, but also aligned with science-based expertise.

The Consortium is galvanising the retail sector to reach net zero emissions by 2040. With One Carbon World’s support, BRC members are equipped with the tools and insights needed to decarbonise with integrity, transparency, and impact — helping retailers navigate the evolving environmental landscape while operating competitively, ethically, and sustainably.

Do you need a technical partner for your organisation? Is your sector’s voice being heard in climate action efforts? Get in touch with us today!

Watch the latest BRC/OCW Webinar

OCW International Leadership

Winner of international Climate Positive award announced at COP28
OCW selected as a United Nations Observer organisation to attend UN Summits
Supported 20% of all the global participants joining UN CNN programme around the world
Selected by the Egyptian Government to measure emissions of COP27 and author the official UN Sustainability Report
Selected as UN Climate Neutral Now Initiative Global Resource Partner
Recognised by the European Commission as Key Carbon Innovators
Testimonials

Impact Stories

"One Carbon World distinguishes itself through steadfast adherence to the highest standards, clear communication, and continuous support—making them a trusted ally in our embassy's unwavering pursuit of sustainability goals."

UK Ambassador

British Embassy Uruguay

"Farrington Oils have worked closely with One Carbon World calculating our whole business carbon footprint on our journey to net zero."

Owner

Farrington Oils

“Thanks to OCW's Kuza Miti project, Flamingo is on a transformative journey towards achieving net zero in Kenya. OCW has been instrumental in uniting horticulture and agriculture communities, fostering collaboration for a more sustainable future."

CSR & Sustainability Consultant

Flamingo

“Client focused ‘not for profit’ OCW has been an excellent partner to us on our climate initiatives over the past three years. Their grant funded nature based carbon offset programme gives genuine value to organisations in their journey to a Net Zero economy.”

Head of Climate and Sustainability

Sopra Steria Group

"Supported by One Carbon World and its grant funding, the UCI has been able to accurately measure, actively reduce, and effectively balance emissions, laying a solid foundation for more sustainable practices."

Cycling for All & Sustainability Manager

Union Cycliste Internationale

"OCW has been an invaluable partner for Westfalia Fruit in our sustainability journey. With their meticulous approach, they have supported us in measuring the carbon footprint of all our operations and farms. The creation of 27 detailed carbon footprint reports reflects OCW's dedication to a comprehensive understanding of our environmental impact."

Environmental Specialist

Westfalia Fruit

“We could not speak more highly of our experience working with One Carbon World for our carbon offsets. Their expertise in carbon offsetting, coupled with the transparency of their grant funding process, has greatly supported our sustainability efforts. This partnership helps us to develop and achieve significant climate action goals, enhancing our commitment to a more sustainable future."

Chief Purpose Officer and Executive Director

World Surf League

"One Carbon World distinguishes itself through steadfast adherence to the highest standards, clear communication, and continuous support—making them a trusted ally in our embassy's unwavering pursuit of sustainability goals."

UK Ambassador

British Embassy Uruguay

"Farrington Oils have worked closely with One Carbon World calculating our whole business carbon footprint on our journey to net zero."

Owner

Farrington Oils

“Thanks to OCW's Kuza Miti project, Flamingo is on a transformative journey towards achieving net zero in Kenya. OCW has been instrumental in uniting horticulture and agriculture communities, fostering collaboration for a more sustainable future."

UK Ambassador

Flamingo

“Client focused ‘not for profit’ OCW has been an excellent partner to us on our climate initiatives over the past three years. Their grant funded nature based carbon offset programme gives genuine value to organisations in their journey to a Net Zero economy.”

Head of Climate and Sustainability

Sopra Steria Group

"Supported by One Carbon World and its grant funding, the UCI has been able to accurately measure, actively reduce, and effectively balance emissions, laying a solid foundation for more sustainable practices."

Cycling for All & Sustainability Manager

Union Cycliste Internationale

"OCW has been an invaluable partner for Westfalia Fruit in our sustainability journey. With their meticulous approach, they have supported us in measuring the carbon footprint of all our operations and farms. The creation of 27 detailed carbon footprint reports reflects OCW's dedication to a comprehensive understanding of our environmental impact."

Environmental Specialist

Westfalia Fruit

“We could not speak more highly of our experience working with One Carbon World for our carbon offsets. Their expertise in carbon offsetting, coupled with the transparency of their grant funding process, has greatly supported our sustainability efforts. This partnership helps us to develop and achieve significant climate action goals, enhancing our commitment to a more sustainable future."

Chief Purpose Officer and Executive Director

World Surf League

"Client focused ‘not for profit’ OCW has been an excellent partner to us on our climate initiatives over the past three years. Their grant funded nature based carbon offset programme gives genuine value to organisations in their journey to a Net Zero economy.”

Sopra Steria

Head of Climate and Environmental Sustainability

"Farrington Oils have worked closely with One Carbon World calculating our whole business carbon footprint on our journey to net zero."

Farrington Oils

Owner

“We could not speak more highly of our experience working with One Carbon World for our carbon offsets. Their expertise in carbon offsetting, coupled with the transparency of their grant funding process, has greatly supported our sustainability efforts. This partnership helps us to develop and achieve significant climate action goals, enhancing our commitment to a more sustainable future."

World Surf League

Chief Purpose Officer and Executive Director

"Supported by One Carbon World and its grant funding, the UCI has been able to accurately measure, actively reduce, and effectively balance emissions, laying a solid foundation for more sustainable practices."

Union Cycliste Internationale

Cycling for All & Sustainability Manager

"OCW has been an invaluable partner for Westfalia Fruit in our sustainability journey. With their meticulous approach, they have supported us in measuring the carbon footprint of all our operations and farms. The creation of 27 detailed carbon footprint reports reflects OCW's dedication to a comprehensive understanding of our environmental impact."

Westfalia Fruit

Environmental Specialist

"We are proud to have been the first British Embassy in the world to achieve the Carbon Neutral International Standard in 2020 — and to have maintained it every year since, thanks to the support and guidance of One Carbon World. Together, we remain committed to bold climate action"

British Embassy in Uruguay

Frequently asked questions

Find answers to commonly asked questions about our services and initiatives.

What is carbon offsetting?

Each organisation has a unique and different carbon footprint. That is why One Carbon World and its team of technical experts can now report on over 7000 calculations. Our team will guide you through this process and will help you to measure your Scope 1, 2 and 3 emissions. We first invite you to select a date and time for a phone consultation with your dedicated technical expert. During the technical call, our expert will explain the emissions sources that we will include and the methodologies we will apply. We will guide you through the data collection procedure and also review any data you have already collected, if applicable. We always attach a guide for data collection for reference. If you have made a self-assessment of your carbon footprint we will talk you through the OCW UN approved verification process. Once we receive your data, our experienced team of carbon auditors will calculate your carbon footprint, and this will be sent for independent external validation.

How can I get involved?

At the global level, the IPCC defines net-zero as the point at which “anthropogenic emissions of greenhouse gases to the atmosphere are balanced by anthropogenic removals over a specified period”. Achieving net-zero is a strategic approach focused on minimising the net environmental impact, ensuring that global emissions are reduced and rebalanced through initiatives like investing in renewable energy projects or adopting nature-based solutions.

What does it mean to reach net-zero emissions at the corporate level?
To reach a state of net-zero emissions for companies consistent with achieving net-zero emissions at the global level in line with societal climate and sustainability goals implies two conditions:
1. To achieve a scale of value-chain emission reductions consistent with the depth of abatement achieved in pathways that limit warming to 1.5°C with no or limited overshoot and;
2. To neutralise the impact of any source of residual emissions that remains unfeasible to be eliminated by permanently removing an equivalent amount of atmospheric carbon dioxide.

Companies may reach a balance between emissions and removals before they reach the depth of decarbonisation required to limit warming to 1.5ºC. While this represents a transient state of net-zero emissions, it is expected that companies will continue their decarbonisation journey until reaching a level of abatement that is consistent with 1.5ºC pathways. IPCC & SBTi

What is green asset verification?

Every organisation that measures/verifies its emissions with One Carbon World, achieves the Carbon Neutral International Standard or the  Net Zero International Standard. Our recognised Carbon Neutral International Standard and Net Zero International Standard are based on a series of steps, and we provide comprehensive support, robust certification and verification, and first-class assessment. There are a set of minimum requirements to achieve the Standard, but we also encourage our partners to adopt best practices where possible, in order to achieve recognition and market-leading status. This means that your organisation will be measuring your emissions to the highest standards of the industry, in line with the Kyoto Protocol and the Greenhouse Gas Protocol, as well as meeting the reporting requirements of the GHG Protocol Corporate Standard and compatible with international standards ISO 14064 and PAS 2060.

How can I apply for grant funding?

To apply to the OCW Grant Fund, you can click the "Get Started" at the top of our page or simply send us an email at hello@onecarbonworld.com. Our team will guide you through the application process, providing support and assistance as needed. We are committed to facilitating your efforts in contributing to meaningful carbon reduction and projects through our Grant Fund.

What is the Partner Coalition?

The carbon footprint is quantified in tonnes of CO2e, and visualising this amount can provide context. Consider the following examples:
- 120,000 smartphone charges.
- Heating an average-sized apartment for two months.
- 72 trips Amsterdam to Paris with the Thalys.
- The amount of CO2 absorbed by a beech tree during around 80 years of growth.
- If one tonne of CO2 were compressed into a gaseous state, the resulting cube would have edges measuring eight metres under normal conditions