> Even if you were right you'd make my point, we use them less but have more of them, since ~50% of a car's environment impact is done before it even leaves the

> Even if you were right you'd make my point, we use them less but have more of them, since ~50% of a car's environment impact is done before it even leaves the factory, you end up with a net negative I'm pretty sure that's not true, unless you're using some definition of "environmental impact" that puts very little weight on the climate impact of CO2 emissions from burning petroleum.