There are zero emissions from bikes. Some people are misinformed that CO2 is a pollutant; it isn't. If our bodies were designed to just exhale pollutants all day, global warming would have destroyed the planet years ago. Other than that, there would be no more traffic jams or accidents, therefor no more lives lost. It doesn't require gas, oil, or any other chemical, so you save money. Plus, what better incentive is better than it is so much more healthy for you?