part of that cost likely comes from the information being hard to obtain, but if EVERY company was required to publish that information it'd be much easier for

part of that cost likely comes from the information being hard to obtain, but if EVERY company was required to publish that information it'd be much easier for any other company to do it too, no? for example, right now a given company has no idea how much carbon their electricity/building/deliveries/whatever cost, so they'd have to figure that out themselves... but if everyone knew that from the ground up, that'd be a lot easier for any other company to produce. there could also be network effects if those reports had to be public, because common vendors' data could be re-used. e.g. UPS knows that their carbon costs for delivering packages are X KG of carbon per KgKm of package-travel, or something, so then everyone can use that factor in their own maths. It'd be incredible effort still, but I see the value. So much "climate damage" now is just classed as economic externalities simply because we don't have a good way to quantify it reliably. Requiring companies to know and disclose that would go a long way to addressing that, and enabling strategic policy response.