One of my original reasons for building Tanzawa was I wanted a blogging engine that, while pleasant to use, put a hard focus on efficiency for the express purpose of reducing carbon emissions. This has informed a number of architecture decisions in Tanzawa itself: no big background tasks, no db server, only make optimized images on their first request to save disk / cpu and more.
To bring this in to focus, each page on Tanzawa has a badge that from websitecarbon.com that measures and reports the amount of carbon required to get that page from my server in Germany to you. It's not perfect, but it raises awareness.
I don't run any analytics on my site, so I have no idea how often people click on things on my site, but my buddy mario saw I post I wrote and decided to test his own fusioncast.fm website.
This is the first documented instance I have of people being inspired to reduce the carbon impact of their sites based on my work! One site down, a million left :)
