Residents of low-density, residential-only sprawling communities are also more likely to die in car collisions^{[original research?]} which kill 1.2 million people worldwide each year, and injure about forty times this number.^[29] Sprawl is more broadly a factor in inactivity and obesity, which in turn can lead to increased risk of a variety of diseases.^[41]

Millions of animals are also killed every year on roads by automobiles—so-called Roadkill.