text: Additionally many people are content with not having a vehicle, or even a licence in some cases, as shown in Source 1, 3, and 4.  In Source 1 Heidrun Walter explains her view on not having a car after previously owning one, "When I had a car I was always tense.  I'm much happier this way."  Carlos Arturo Plaza in Source 3, shows his support inlimited car usage by saying how it helps the environment and the health of the people in reducing stress, "It's a good opportunity to take away stress and lower air pollution."  In Source 4 Elisabeth Rosenthal speaks of how her own children and Mr. Sivak's son, all avoid using cars and Rosenthal's children don't even have licenses and they are 19 and 21 years old.