Some foods are greener than others, but how much greener is one food compared to another, exactly? Can we put a number on it? It turns out that we can, and people have, but it’s much more complicated to do than you might think.

Very quick update for early adopters of EcoTweaks: you may have noticed that the "CO2 saved by everyone" metric on the homepage went down today by about 900kg. This was just a quick calibration to make sure that none of the carbon savings made by the developer for testing purposes were included in the app going forward. From now on, that number is genuinely how much we have saved together as a community. It's incredible to see that we have already saved 286kg of carbon emissi