“If I am not mistaken, a cyclist 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." See story here;http://www.newjerseynewsroom.com/healthquest/orcutt-reverses-course-on-bicyclists-polluting-air-comment
Sure looks like there is lots of pollution coming out of Washington DC these days. There is so much hot air coming out of politicians mouths in our country. They can't seem to think straight.