How has the ubiquitous (found everywhere, universal) nature of automobiles changed the US?

Answer Critical Thinking Question 4 found on page 193 of your textbook: How has the ubiquitous (found everywhere, universal) nature of automobiles changed the US? DO you feel these changes are, on balance, positive or negative? What should the future look like regarding automobile use in the US? How can this be accomplished? Be sure to answer the question completely and explain your thoughts.