In this episode of Environment Variables Chris Adams is joined by Fershad Irani, an independent web sustainability consultant and maintainer of CO2.js. They discuss topics like open data on the greenness of power, the wonders of HotCarbon, new projects from the cloud native computing foundation and the Green Software Foundation, and gzip.ai. Fershad shares his experiences working with the Green Web Foundation and the growth of the open-source carbon estimation library, CO2.js and there’s a cameo from Fershad’s cat!