Oh America, you'd be so cute and silly if you didn't have all those nuclear weapons! (from Tom S)
'You claim that it is environmentally friendly to ride a bike. But if I am not mistaken, a cyclists [sic] has an increased heart rate and respiration. That means that the act of riding a bike results in greater emissions of carbon dioxide from the rider. Since CO2 is deemed to be a greenhouse gas and a pollutant, bicyclists are actually polluting when they ride.'