Comment by ben_w

I don't buy that reasoning, even with that desire to manage their reputation:

Those lists are the companies marking their own homework and congratulating themselves as PR, AKA "greenwashing". They can do that just fine by spinning a single metric of their choice where they do less-badly than their pick of mean, median, and mode of whoever else they want to compare themselves against, they don't actually need to be genuinely eco-friendly at anything.