Our lives depend on getting to our work, school, church, vacation and anywhere efficiently and safely.  A family's decision about their mode of transportation and their personal vehicle(s) are very personal decisions.  But we need to understand that this decision also impacts our community and the entire planet.  The carbon footprint and other emissions can vary by a factor of 10-20 times which can harm others.  But the cost, availability and time to destination can also vary dramatically which affects our family's time and budget.