To be honest I have always been wondering if cycling is that “greener” (way for TJ to come and spout his bile) compare to other mean of transportation like public transport.
You could say you don’t burn fossile fuel, but on the other hand, lets face it you need to buy a fair amount fo things to be able to commute in a safe and comfy way.
Lights, locks, fluoro jackets, waterproof trousers rack and pannier. Plus you tend to eat more, so more food to process go to the shop more rubbish etc etc.
I have calculated that during the 3 month I have been commuting by bike in southampton it actually cost me more that if I’d commute by car.