This document discusses the author's reliance on their personal car for transportation and how this creates an unsustainable "footprint problem". The author notes that using a personal car relies on fossil fuels, requires significant resources to support automobile infrastructure, and uses a large amount of energy to transport just one person. The author analyzes their car usage as a "design problem" that could potentially be solved by creating more sustainable vehicles or transportation methods. However, the author acknowledges that a massive redesign of both technologies and infrastructure would be needed to make transportation truly sustainable.