Question car culture. Industrial manufacturing practices are the primary reason the earth's air is polluted[1], but car-related pollution is the next biggest culprit. The manufacturing of cars and roads, the production of fuel, and the emissions that result from burning that fuel all play a part.[2] Since many cities are laid out in such a way that driving is almost a necessity, it can be hard to determine the best way to combat this problem. No matter where you live, you can take action by finding creative ways to be less dependent on cars.
It may not be practical to give up your car entirely, but you can still take action by reducing your use of your car. For example, instead of driving to the grocery store every other day, make one trip every week or week and a half, stocking up on everything you need all at once.