text: In similarity, millions of Colombians hiked, walked and did many other activities without touching a car to prevent the smog. These cities are working together to make the world a better place. "In a program that set's to spread to toher countries, millions of Colombians hiked, biked, skated or took buses to work during a car-free day yesterday"(Andrew Selsky, paragraph 20). The goal is to promote alternative transportation and reduce smog, and they achived it. That day without a car was an improvement camapign in Bogota. Surprsingly, in the US recent studies have stated that Americans are buying fewer cars and driving less each year that goes by. "if the pattern persists- and many sociologists believ it will- it will have beneficial implications for carbon emmisions and the environment"(Elizabrth Rosenthal, paragarph 34). There has also been changes in the US. Driving less has stopped air pollution.