The point that many people make: "* Upto 50% of pollution a car will cause is done during production of the car ie before even a kilometre has been driven. Replacing lots of good working cars from the street is not environment friendly."
It is not just overall pollution, but where and how it is done that it is important. There is a huge difference between controlled pollution, from a factory away from large cities, and thousands of cars spewing emissions right into the core of urban centers. The second would cause more direct health issues and potentially deaths and overall unpleasantness.
The point that many people make: "* Upto 50% of pollution a car will cause is done during production of the car ie before even a kilometre has been driven. Replacing lots of good working cars from the street is not environment friendly."
It is not just overall pollution, but where and how it is done that it is important. There is a huge difference between controlled pollution, from a factory away from large cities, and thousands of cars spewing emissions right into the core of urban centers. The second would cause more direct health issues and potentially deaths and overall unpleasantness.