I discovered this a while back, and have used it for many of my "pet projects". It's super easy to use on it's own and also to integrate in existing workflows. What is amazing is to get visualized that digital and tech has quite a big carbon footprint! Helps bring awareness. Co2.js supports two models for calculating the carbon footprint; - 1byte - Sustainable Web Design (SWD) For those in the web/internet business, this is a great tool to also get a sense of your Scope 3 (GHG protocol) emissions.