In very few places in America is walking/biking more efficient than cars. The author is not saying autos are inefficient, which is a valid argument, he is sayin

In very few places in America is walking/biking more efficient than cars. The author is not saying autos are inefficient, which is a valid argument, he is saying there is a conspiracy ("automobile supremacy") to supplant other forms of transportation with the automobile. This is simply foolish.