A better rating would be longevity and availability of parts. We used to make things that lasted for decades and when they broke, you could get replacement parts. Now it’s all short lived china junk that you can’t fix. Everything’s disposable but no one says anything about how GREEN that isn’t. By the time you buy something, china factories are belching smoke and fumes to make it’s replacement.
I’d settle for efficiency.
How much water and energy needed to clean x number of pounds of clothes using a specific washer cycle for instance. Our washer AND dryer are brand name, Energy Star rated pains in my glutes.
My Energy Star fridge that we bought because we couldn’t remodel to fit in a bigger model has less room inside than the same size model it replaced and is another PITA.
AAAAAARGH.