>Replacing lots of good working cars from the street is not environment friendly.
This is generally the reason why most legislation of this type tries to dictate new car sales rather than actual usage. That route would yield slower results, but it is a more efficient approach.
That said, we also need to keep in mind that these electric cars aren't going to be replacing 5 year old vehicles. The strong secondary market allows those used cars to flow down market to push out much older and lower quality vehicles. Those low quality cars are also likely the worse polluters. Think of the Cash For Clunkers program. That was a failure on many levels, but one of the successes was modernizing some of the vehicles on the road which led to both better fuel economy and safety (although I should note that other aspects of the program had negative environmental impacts that might have made the program a net negative overall).
Ola/Uber cars are mostly new taken on loan in India.
China has shown the way to do the transfer. Super high taxes for registration of a petrol/diesel car and free registration for an electric one. Build cars at home and subsidise its components.
No hand-waving required. Just make it more affordable. Let capitalism finish the job.
This is generally the reason why most legislation of this type tries to dictate new car sales rather than actual usage. That route would yield slower results, but it is a more efficient approach.
That said, we also need to keep in mind that these electric cars aren't going to be replacing 5 year old vehicles. The strong secondary market allows those used cars to flow down market to push out much older and lower quality vehicles. Those low quality cars are also likely the worse polluters. Think of the Cash For Clunkers program. That was a failure on many levels, but one of the successes was modernizing some of the vehicles on the road which led to both better fuel economy and safety (although I should note that other aspects of the program had negative environmental impacts that might have made the program a net negative overall).