I guess you have to eat a bit more if you ride more, I certainly notice when I bike to work (5mi each way, 300ft climb) that I need to eat a bit more food. Certainly no where near the energy of a car though but its not zero. Assuming you want to maintain your weight.
It's interesting because the food you eat makes a big difference then on your commute. A diet high in beef or fresh fruit could actually make your commute WORSE than an electric car.
Biomass is not a particularly low emissions energy source.
That’s a strong assumption. I for one wouldn’t eat less if I stopped biking. I commute to work, do shopping and go everywhere by bike throughout the year. I don’t own a car.
Are you saying you have a mythical body that burns no calories when biking? Or are you saying you'd be willing to gain more weight because you'll never change your diet?
Just my experience. I stopped biking to work due to COVID and I eat less than before. I tried to just go for a 5mi ride in the morning but I'm not motivated w/o the commute and just take the dog for a walk instead.