> We also estimate that urban residents who switched from driving to cycling for just one trip per day reduced their carbon footprint by about half a tonne of C

> We also estimate that urban residents who switched from driving to cycling for just one trip per day reduced their carbon footprint by about half a tonne of CO₂ over the course of a year, and save the equivalent emissions of a one-way flight from London to New York. Put differently, reducing air travel is much more effective than ground travel habits at reducing your carbon impact. > When we compared the life cycle of each travel mode, taking into account the carbon generated by making the vehicle, fuelling it and disposing of it, we found that emissions from cycling can be more than 30 times lower for each trip than driving a fossil fuel car, and about ten times lower than driving an electric one. I'm surprised that bicycles are only 30/10x less. It seems like, before any usage, manufacture of a single car would use far more than 10x the energy of manufacturing a bicycle (1000x?).