Green Car, are they all green not at all. but, which are the most efficient way to go for green?

I was watching this documentary the other day and something in the show got me wondering.
When we say going green are we truly into it or are we just talking about money again.
It’s really funny when you saw that a third world country city in India can have over 3000 electric taxi yet a first world country like America can’t even get one taxi driver to get theirs changed. The electric taxi cost about 12k each. And they have the most primitive setup, just 6 car battery and you are off. Some may have autogenerator in the vehicle. And you may recharge it with any home socket plug. And if your battery are about to go off. You may get any pre-charged battery set from any gas station or battery station.
So isn’t that the perfect set up? Just your home can be the charging station and all gas station have the set of battery to replace everytime and it cost even less than gases.
If you are asking about the trade off of using battery may cost more non-green garbage. It’s not like that any zero emission vehicle is not. The very expensive hydrogen car though have no carbon emission but hydrogen are hard to find and the production of hydrogen fuel is from fuel degration which also produce more carbon that usual which is not exactly the perfect plan for 0% non-green garbage production either. And with one hydrogen car you’d have bought over 300 electric taxi produce by the Indian. Which could easily replace the whole New York’s taxi system and the whole LA Taxi system with the price of 2 Prius. Which the prius a hybrid is not exactly a 100% clean system either.
So if you are thinking about green go electric. They are totally cheap. And totally workable. Much better in my opinion than Hydrogen. And you can straight away become zero emission right now. Just replace all you cars with battery one instead of gas.

Well, I'm not saying you shouldn't try green. just one thought which is the fastest way and most effective.