soot from the exhaust pipe on the finger. examination of the car

automobile automotive bigcar black blacksmoke bumper car climate consumption costs damage dangerous diesel dirt dirty ecology ejection emission engine enviromanetal environment environmental environmentpollution environmentprotection exhaust exhaustfumes filter finger fuel fuelconsumption fumes gas greenhouse immission inspection malfunction money nuisance pipe pollution repair road savefuel smoke soot transport transportation unhealthy vehicle wasteenergy