Carbon funds and carbon offsetting: maximizing the real-world benefits of your climate contributions
Ombline Planes
Director of Communications
Reading time: 5 minutes
In France, each tonne of CO₂ emitted incurs an average of €110 in hidden costs—impacts on health, biodiversity, and infrastructure—so the motivation to offset emissions seems logical. However, studies show that as many as 85% of carbon offsetting projects do not deliver their intended impact.
To address this uncertainty, it’s crucial to support organisations that rigorously measure and guarantee real climate and societal benefits, rather than funding projects blindly.
What is a carbon fund?
First, let’s define what a carbon fund is. It is a financial mechanism designed to support projects that reduce greenhouse gas emissions or sequester carbon—such as renewable energy development, forest conservation, or sustainable land management. Carbon funds can be established by public entities (like local authorities or governments) or private organisations (such as banks, companies, or cooperatives). By channelling resources into diverse climate solutions, these funds can help both meet voluntary or regulatory emission reduction targets and deliver co-benefits, like improved biodiversity.
However, carbon offsetting should complement, not replace, direct reductions in emissions if we are to achieve carbon neutrality by 2050 (carbon neutrality set for 2050).
In reality, the effectiveness of carbon offset projects varies widely, and their true impact is often difficult to measure. This lack of transparency increases the risk of greenwashing, where climate benefits are overstated or unclear.
How do carbon funds work in practice?
Carbon funds pool capital from local authorities, businesses, and investors to finance projects certified based on key criteria such as additionality (ensuring emissions reductions wouldn’t occur without the project), permanence (long-term carbon storage), and social and environmental co-benefits. Strong governance, involving approved steering committees and climate experts, is essential to ensuring transparency, robust monitoring, and credibility of the carbon credits generated.
What are the concrete benefits for regions and investors?
By participating in these funds, regions stimulate their rural economies through locally led projects such as afforestation, hedge planting, and methanization—a process that converts organic waste into renewable energy. These initiatives create employment opportunities and diversify income sources for farmers and communities.
Investors, meanwhile, receive credible returns on their financial contributions, quantified as tonnes of CO₂ equivalent avoided or captured, delivering tangible impacts on both global warming mitigation and biodiversity conservation.
Why do 85% of carbon offset projects fail?
Despite their laudable intentions, the vast majority of carbon funds have structural flaws that significantly reduce their effectiveness:
- Labels that are too lax : Many carbon offset labels or certifications lack mandatory periodic checks or independent on-site audits. Some rely heavily on self-declared data, which reduces transparency and accountability. This creates significant risks of greenwashing—where reported emissions reductions are overstated or unsupported.
- Doubtful additionality : According to a survey by the Öko-Institut for the European Commission, 85% of Clean Development Mechanism (CDM) projects were probably not truly additional. This means these projects likely would have occurred anyway without carbon finance, so issuing credits for these does not represent additional net reductions in CO₂.
- Risks of permanence : Carbon sequestration projects, such as reforestation or afforestation, face significant risks that stored carbon is not permanent. For example, nearly 44% of young trees in reforestation projects die within 5 years due to factors like fires, disease, or poor maintenance. As a result, tonnes of ‘stored’ CO₂ can be quickly released, negating the expected impact. : Too often, carbon offset projects fail to generate sustainable jobs, skills development, or opportunities for local communities. In some cases, they even trigger land conflicts, a form of “green grabbing,” where land rights and resources are appropriated without fair compensation or consultation. Without genuine local ownership, effective operational management and ongoing monitoring become compromised, threatening the project’s long-term viability and impact.
Consequences: A growing gap develops between the volume of carbon credits sold and the actual amount of CO₂ permanently removed or avoided. In other words, many projects deliver more promises than tangible, lasting results.
Impact giving: a proven solution that drives measurable climate benefits
Rather than limiting itself to offsetting, impact giving directly supports organisations and projects that actively reduce greenhouse gas emissions or sequester carbon in a measurable and sustainable way. Here’s why this approach is more effective:
- Transparency and Impact Monitoring: Every euro donated is rigorously tracked through comprehensive reporting, key performance indicators, and independent audits. This ensures that the claimed climate outcomes—measured in tonnes of CO₂ equivalent avoided or sequestered—are realised and verifiable.
- Prioritisation of the Most Effective Projects: By employing stringent evaluation and selection criteria, funding is directed toward initiatives that deliver the highest ratio of CO₂ reductions per euro invested. This approach maximises the climate impact of every contribution.
- Social and Environmental Co-Benefits: Impact projects typically integrate local social and environmental dimensions, including job creation, skills training, and biodiversity conservation. These co-benefits enhance the resilience and sustainability of both communities and ecosystems, creating lasting positive change beyond carbon metrics.
Carbon offsetting vs impact donation
Criterion | Carbon offsetting | Impact donation |
Clarity | Purchase of a credit with limited project details | Clear description of the project, its objectives, and scope |
Monitoring | Occasional checks and limited reporting | Regular monitoring with key indicators and annual reports |
Co-benefits | Often overlooked, social and biodiversity impacts frequently absent | Systematic integration of social and environmental benefits |
Additionality | Poorly verified; risk of funding redundant projects | Guaranteed additionality through independent audit processes |
Permanence | Not guaranteed; vulnerable to reversals (e.g., fires, illegal logging) | Supported by long-term management plans and maintenance guarantees |
Transparency | Limited financial disclosure | Open governance with public access to raw data and reports |
By prioritising impact-based donations, every pound you contribute is transformed into measurable tonnes of CO₂ avoided, sustainable local jobs, and strengthened ecosystems.
What you can do today: impactful giving for the climate
- Discover our page on the most effective actions to mitigate climate change: https://mieuxdonner.org/changement-climatique/
- Make a donation to Clean Air Task Force : Donate £100 and reduce 100 tonnes of carbon = more emissions than 125 transatlantic flights.
- Donate to the Good Food Institute : A €100 donation to GFI prevents 33 tonnes of carbon emissions = approximately the equivalent of 20 transatlantic flights.
- Support Mieux Donner to help structure philanthropic initiatives that have a measurable impact.