I was just wondering what the appetite would be to help individuals understand their impact on the climate based on their spending? Monzo could have factors tied to spend so users get a better idea as to their carbon footprint from purchased goods and materials per transaction. They would be high level factors for each activity eg Tube, taxi, grocery shopping, coffee etc. Similar to the monthly budget, you could see your monthly impact on the climate and potentially set targets.
I for one would love this to be a feature of Monzo. Happy to discuss further if there is any interest.