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Why? Single person still in the car (plus uber driver), city still congested, polluted, co2 the same or maybe worse. What's the difference?

Less cars have to be produced, maintained, driven in, parked, driven out, scrapped. All-round win.

This formula breaks down when you have a kids that go to school and worse still, two separate schools. Not everyone can hop on a bike.

Are you replying to the right thread? We're not talking about bikes here. We're talking about cars vs taxis.