So you have two identical websites, down to the cable materials, distance of workers and everything else. Basically a 1 to 1 clone. One website has one person not going to office to manage the site, the other website does not. Even if that person is only WFH one day a year compared to the other that is two trips not driven.

Many people here in Sweden that doesn't live in a big city has quite some distance to work with no viable mass transit options (you are no longer allowed to ride on the school busses where I live which means that the closest bus station is 18 km from me) which requires a car.

Most of our electricity comes from water with other renewables constantly developing, so I don't think the electricity source would matter much since it's not server hosting.

Edit: my first post was also in jest while agreeing with it being super complicated with an almost infinite amount of hard to measure variables to boil down to a single digit or letter