Sounds good, but let’s break it down into clear modules: data ingestion, eco‑score calculation, recommendation engine, and UI/UX feedback loop. We should start by defining the key metrics—carbon footprint per action, user engagement rate, and retention. Then we can design a lightweight algorithm that balances personalization with sustainability goals. Once we have that, we can iterate on the interface to keep the experience intuitive and motivating. Let's get to the architecture diagram.