There are several articles on this if you Google. Some schemes do have some benefit but many are deemed to be ‘guilt-free’ schemes, that do little of what they promise but make people feel better about themselves…
Equally how would Monzo split this down?
Carbon generated by all their offices? How about the card manufacturers (who also make cards for others), or the paper/cardboard used to send out your card? Do Monzo events need to be included? Ohh and I have a Monzo sticker, where does that sit?
It’s hard enough to do this as an individual, let alone a company.
A laudable aim, for sure. But practically any Monzo ‘Green’ account would be notional at best. Which, granted, still may be a good thing, it’s better than nothing after all!!