Question: Which brand of coffee hurts the environment most severely and why?

Amy Stockwell answered on 7 Feb 2021:

There is no one brand that is particularly good or bad. (Though I’m sure that there is a carbon neutral brand which I don’t know about yet!).

Coffee beans come from a range of farms, some of which will use fertiliser and fuel more efficiently than others. Unless you buy really expensive specialist coffee from a named farm, a product you buy at the supermarket will have beans from many farms.
All companies aim to make their factories as efficient as possible, because energy and materials cost money as well as be bad for the environment. The same is true of packaging.