Earth Day is an annual global event that occurs every April 22 to raise awareness and show support for the environment. During those 24 hours, everyone will be urged to monitor their carbon footprint and energy consumption, but for some celebrities, respecting the environment is an around-the-year commitment, as proven by their choice of vehicle. (Don't worry, on April 23 you can go back to dynamiting dolphins and burning coal by the shovel full.)
