Significantly lower your carbon footprint by running like the Tarahumara tribe in the Sierra Madre Occidental (Canyons). These indigenous people retreated to the Copper Canyons to escape the invasion of the Spaniards. The culture of the Tarahumara (also known as Raramuri--the running people) is unique because the run miles and miles a day to get where they need to go. Not only that, they run in sandals.