Nitrogen oxides combined with hydrocarbons in sunlight cause ground-level ozone aka this urban pollution

Below you can find the Nitrogen oxides combined with hydrocarbons in sunlight cause ground-level ozone aka this urban pollution Jeopardy Words Answer. The answer to Nitrogen oxides combined with hydrocarbons in sunlight cause ground-level ozone aka this urban pollution has 4 letters. This clue belongs to the Eco trip category and is part of Jeopardy Word Level 2554. If you scroll near the bottom you will find other clues and answers part of level 2554