It's quite simple math, for instance ambulances deliver every year thousands of people in life threatening conditions, while road deaths are in low hundreds, th

It's quite simple math, for instance ambulances deliver every year thousands of people in life threatening conditions, while road deaths are in low hundreds, there is no noncar alternative to ambulance really. Regarding pollution it would be very complicated to calculate, but I think you overestimate impact of public and personal transport on pollution, it's negligible compared to other sources of pollution calculated per capita.