A few weeks ago, the HTTPArchive published the 2022 edition of the WebAlmanac: https://almanac.httparchive.org/en/2022/. For the first time ever, the report includes a section on #sustainability. The chapter contains tons of great insight and advice.
Still room for improvement, but it means that we're well on our way of meeting our goal of encouraging 40%+ of .eco community members to use #eco-friendly web hosts in 2023: https://go.eco/news/2022-impact-report/