I shit you not, the methodology is to load small-ish web pages with *no JS*, totally ignore power use from screens and radios (you know, the big ticket items?), guestimate that the average device uses power like a gaming rig, then do shoddy multiplication.
To what end? To try to extrapolate how much energy `<div>` or `<video>` use, totally ignoring the actually dominant factors.
This is WILD.