Doing your bit for the environment is now as easy as answering 3 questions a day with TreeApp. Personally I find it a bit annoying that it’s advert based but I can overlook that each day to plant a tree.
Another paid paid option) I buy into monthly is Ecologi. The family plan (and one tree in the UK each month) costs me £16.90. This, in theory, offsets my carbon each month.