This project is super cool. I would recommend the author starts tracking the amount of CO2 he emits in a year, which could easily be approximated with the flight/transportation and food data he has. Carbon emissions per Capita per year in the US: 18 metric tonnes. In Italy: 8 metric tonnes [1]. Author is probably close to 60-80 with all the transatlantic flights. [1] https://www.theguardian.com/environment/datablog/2…
For the more lazy among us, there's also Wren which lets you do some estimates: https://www.wren.co/ Then, they actually let you donate/spend a bit of money towards offsetting your individual carbon footprint, towards whatever initiatives you choose (personally donated towards planting trees). It's not like it would have as much of a profound impact as stopping the mega-corps would, but it's still something and prett…
A little = 140€ / month. Wow. What do people do, redecorate every year?
edit:
11 tons of CO₂ per year
That's 64% less than the Germany average for your household size.
I guess the two of us are pretty ecological ;) But I just realized they didn’t ask about heating (afaik oil based and I have only costs, no usage numbers), so that might make some difference.