You even get a wide variety of fuel options for your bicycle. I rode one to work every day for a few years, and my fuel of choice was oatmeal, which is healthy, cheap, and delicious (esp. w/ berries and honey).
Unfortunately, I changed jobs and cycling is no longer practical, but riding a horse is even less practical (can't really tie them to the parking garage in the city...). Maybe I'll get an e-bike and get back in the saddle.
But there's also the byproduct of making you swole and potentially making exercise your new hobby, which then further increases your energy consumption and waste output...