It is no secret that adulterated petrol used by three wheelers are the major cause for increasing air pollution. According to a CEPT study, out of the 42,000 total registered rickshaws in Ahmedabad city, 67% were polluted beyond permissible limits and 45% ran on kerosene-mix levels. According to officials, daily about 15-20 rickshaws from different areas in the city are impounded during random checks and punished for flouting pollution rules.