text: Next, Limiting car usage, is a great idea, because, according to the passage, up to 50 percent in the United States, there are car-intensive areas. Car-intensive areas, such as the traffic jam. Traffic jam, can be very dangerous at some point, and it keeps people very tired and fustrated. According to the article, In Bogota, Colombia, there's a program set to spread to other countries, millions of Colombians hiked, biked, skated, or took buses to keep the area as a car-free day, leaving the streets devoiding of traffic jams. So try to ride a bike, walk, skate, or do something, that can be a car-free day, a much safer environment.