Inspiration
An environmental claim needs more than a headline number. Reviewers need its evidence, method, observation dates and limitations. CCEL explores how to make that evidence inspectable and keep corrections visible, using the İzmir-Orhanlı wildfire assessment as a worked example.
What it does
CCEL is an evidence desk for environmental claims. It brings a declared claim, study boundary, satellite scene references and method into an evidence package. Its interface presents five quality checks, evidence inspection, threshold sensitivity and a review history anchored on Ethereum Sepolia.
The demo follows a provisional assessment through a challenge, a revised package and a review. The goal is to preserve the reasoning behind a correction rather than replace an old number without explanation.
How it is built
The prototype combines a web interface, a Python analysis workflow and Sepolia smart contracts. The evidence workflow uses Sentinel-2 imagery and dNBR burn-assessment outputs. Package hashing links the evidence to its recorded commitment, while the ledger records submission, challenge and review events.
Challenges and lessons
Evidence integrity and scientific correctness are different. A matching hash can establish that a package matches its commitment; it cannot establish that the environmental claim is true. Observation dates, calibration, study boundaries and thresholds must remain visible when comparing estimates. Spectral greening alone does not establish replanting or carbon recovery.
Current scope
This is a wildfire-assessment prototype with an İzmir worked example, not a universal environmental certification service. The demonstration reviewer wallets are controlled by the project team. On-chain approval records a review decision, not independent scientific certification. A local draft is not an on-chain submission, and a new location needs its own processed evidence rather than reused demo results.
What's next
Extend the supported analysis modules and locations, improve new-package validation, and enable reviews by independent participants.
Built With
- ethereum
- foundry
- python
- sentinel
- sentinel-2
- sepolia
- solidity
- typescript
- vite
