I started keeping a spreadsheet of my carbon footprint earlier this year, but it was inconsistent and spotty; it is hard to be enthusiastic about this during a pandemic when every single day was exactly the same as the one before. But I did use the time to find more data, refine the numbers, and as of 1 August have started fresh. Basically, everything that I do that has a footprint and that is variable is tracked daily.
Lloyd Alter 