Couldn't read the article. Of all fields though, I wouldn't expect banks to be big climate affectors in the first place. Is this maybe related to compute costs for trading? Or investing in climate-positive ventures?
Posting to complain you can't read or even worse posting to complain about the source of something you didn't read is worthless to everyone including the people who didn't read the article
It is unfair to assume everyone knows the dozen ways. It would be helpful to share some of those. So far none of the alternatives posted are working, so the article should be flagged for removal.
It's against the guidelines to complain about paywalls in comments.