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How to choose projects for CO₂ offsetting

Choosing the right reforestation project is key to ensuring your CO₂ offset efforts are meaningful, transparent, and aligned with your goals.

This article explains how to make informed choices based on your climate objectives, budget, and reporting needs.

🌍 Understand how offsetting works on Tree-Nation

Tree-Nation offers a curated selection of nature-based projects that can offset CO₂ emissions through reforestation. Each project has:

  • CO2 included in each tree
  • Verified CO₂ sequestration estimates per tree
  • A detailed methodology aligned with climate science

  • Full transparency through your Forest Impact page carbon issuance and retirement logs 

🔎 How to find certified projects on Tree-Nation

  1. Visit the Projects list.
  2. Click the All filters button.

    All filters selection
  3. Scroll to the Advanced filters section at the bottom of the window.

    All Filters Window
  4. Select your desired checkboxes from the list.

🌐 How to choose your certification

Tree-Nation offers two certification approaches within the same carbon certification framework, based on how carbon is measured, monitored, and validated for each project type:

  • Foundation: Uses confirmed carbon datasets, including AGC (Aboveground Carbon), to quantify carbon sequestration with sharper carbon-specific metrics as the project develops.
  • Mission: Uses EVI (Enhanced Vegetation Index) as an independent remote-sensing indicator to track vegetation growth and certify carbon impact in complex, mixed-species, biodiversity-rich, or community-led restoration systems.

Both approaches are transparent, evidence-based, and monitored over time. Foundation provides more carbon-specific data resolution where AGC datasets are available, while Mission applies a broader ecosystem-restoration methodology where vegetation development, field evidence, and project monitoring together support CO₂ certification.

The Tree-Nation Methodology is Tree-Nation's original in-house approach, applied to legacy projects that have not yet been certified under our Foundation or Mission framework.

These projects remain fully operational and transparent, with per-tree CO₂ estimates and forest-level tracking. Over time, they will be progressively upgraded to Foundation or Mission certification, where eligible, or phased out from our active offering.

In addition, Tree-Nation integrates external and national certification frameworks (e.g. MITECO) where relevant.

For a detailed comparison of both approaches, see our dedicated certification guide.

✅ Are these certifications compatible with EU regulations?

Yes. CSRD and ESRS focus on transparent reporting rather than prescribing one single carbon certification standard. Tree-Nation certifications support this by providing documented methodologies, project-level transparency, carbon tracking, issuance records, and retirement logs.

Companies remain responsible for their own regulatory reporting, but Tree-Nation provides the data and documentation needed to support credible climate contribution and CO₂ offset reporting.