Biking is greener than driving? Yes, but… Yes, biking is cheaper, and good for exercise, and saves gas, and better for the environment, and better for the neighborhood.
But were cars worse than what they replaced — horse-drawn vehicles and the mountains of manure?
Also, we would not have the high quality bikes that we enjoy today without the modern car industrial production process — steel and aluminum factories, plastics, precision machining, vulcanized rubber and oil-based lubricants.