Human-made air pollution comes from many things. Most air pollution made by humans today is because of transportation. Cars, for instance, make about 60% of the human-made air pollution. The gases inside car exhaust, like nitrogen oxide, make smog and acid rain.
The average price of a new car in America tops $33,000, according to car-buying site Kelley Blue Book, so buying a vehicle is a major financial move. While many consumers focus on sticker price or the monthly payment, that overlooks many other costs.
What is the average cost to replace your car engine? For my car engine, the average cost would be around $60,000. An unweighted average across all models of car would be around $250,000. Perhaps you should narrow your question to a specific model?