Grid aware site

In rebuilding their website Alasdair Smith has programmed a feature that renders based on the sources of electricity from your power grid. In their words:

Grid aware websites change their content and user experience based on the user’s electricity grid. The concept was originally developed by Branch magazine and later by the Green Web Foundation’s Grid-aware websites project.

CSS animations get disabled and images use alt-text among other changes based on the cleanliness of the electricity. From what I could see my power grid is indeed clean!

It was my first time hearing about this, the implementation details are interesting and Alasdair links to some follow-up resources.