I found this thread about Carbon Offsetting in Monzo 🏭 quite interesting.
I would be willing to pay an amount each month for Monzo to analyse my spending to calculate my approximate carbon emissions and offset them using a trusted third party. e.g. Spend £600 as British Airways, recognises its likely to be a long haul flight automatically offsets the amount / nudges me to make a contribution. Obviously depends how much these schemes cost and if it can be calculated to a reasonable accuracy - There is a challenge for someone!
Anyway, that is my take for an ‘add on’ for Monzo.