3 ms·

Source? This study says bicycling is way better than cars: http://bikeportland.org/2011/12/12/new-study-compares-bicyclings-co2-emissions-to-other-modes-63536 h

• emp_zealoth 10y ago
  I would be rather wary of bike endorsing studies posted on sites called "bikesomething" just as I would be wary of "rightwingnut.com" publishing studies on immigration or any other contentious issue.
  • crottypeter 10y ago
    In this case there isn't even a link to rightwingnut.com though. Just a claim that you need to do math. Parroting climate-denying, anti-intellectual nonsense is worth calling out.
    • ars 10y ago
      The study EnigmaticLion linked is as bad as you might expect. They have a chart showing CO2 per calories for different foods which goes from 11 to 1431. But when they do the final result for a bicycle using some kind of global average food consumption they use the number .144! Unless I've really messed up my math, the number for a bicycle should be around 200 to 1000 times higher than what they show. Next they take car emissions, do some "magic math" and change them from 42 g/km to 229g/km. Using their own numbers, but fixing their math shows a bicycle emitting more than a car.
      • crottypeter 10y ago
        > Unless I've really messed up my math, You have. The chart is in (g per 100 kcal) >"magic math" and change them from 42 g/km to 229g/km. 42 is for production of the car 229 is for ‘well to wheel' emissions (i.e. exhaust-pipe plus those emitted to produce the petrol). No "magic" required.