I don't remember where but I heard that just manufacturing a car cause more pollution than it's entire lifetime on the road. If Uber prevents people from buying cars then Uber may actually be environmentally friendly.

Well then you'd need to balance that against all the new cars that Uber and Lyft drivers lease to support themselves. Cars that might have sat rusting on the lot while reasonable consumers chose to buy more affordable pre-owned vehicles.

Creating a market for new cars only ensures that new cars will continue to be produced in high volume.

Consistent with the 'smart car' idea, where they manufacture cars with a low-environmental impact, yet the cars have poor gas mileage. To be a win, what you said would have to be true.

I've wondered about that for some time.

> If Uber prevents people from buying cars then Uber may actually be environmentally friendly.

How about the new cars that Uber is encouraging their drivers to buy with tantalizing financing?

I don't have a source but I assume that the driver:rider ratio of cars owned times pollution of manufacturing is greater than the rider:driver ratio of time driven time pollution of driving.