Earlier quoted context omitted.
> We also found that the average person who shifted from car to bike for just one day a week cut their carbon footprint by 3.2kg of CO₂ – equivalent to the emissions from driving a car for 10km, eating a serving of lamb or chocolate, or sending 800 emails. This is interesting, but might it be possible that at least some those cyclists ate 1 more serving of lamb (or other high-carbon meat) or chocolate than they norma…
Are you suggesting that a cyclist would cancel out CO2 gains because they would need a whole extra meal of lamb per day? Apart from not being true this ignores all other externalities of car ownership and usage in cities.
Data please. I'm posing a question and looking for data, not speculative conclusions.
I'm a cyclist myself and I can definitely say that after biking 10km I end up wanting to eat more protein (and chocolate) than I usually do. Maybe not an extra full meal unless I do a century, but definitely a different meal than if I hadn't biked at all. Also, after exercise I often end up tired and buying food instead of making it myself. All I can say is that my eating habits do differ on days that I bike. I eat plant-based protein but there are lots of people who don't. That's why I posed the question.