My current pre-PV-system lifestyle according to MyFootprint.com adds up to 2.5 terrons, but I'm not sure how they got at the number.

First, repeating the test with energy self-supply choice doesn't change the result.

The number for mobility is the super-low one I expected, what really stands out (almost half of my footprint) is goods/services. But there weren't many questions (to be exact, there was one: on rubbish) that ask about my use of those. I think detailed questions on my purchase would definitely put me lower.

_{*Lunatic*, n.
One whose delusions are out of fashion.}