f its abili ientists heasure hen foss ew year increase use gas particulate matter sulfur dioxide tropospheric ozone nitrogen dioxide carbon dioxide carbon monoxide lead 1. Before the 1980s, gasoline combustion was a major source of this pollutant. 2. This pollutant's chemical structure is three bonded oxygen atoms. Its concentration is strongly influenced by sunlight levels and air temperature. 3. Pollutants in this category are classified according to diameter. Reset 4. This pollutant deprives organisms of oxygen by binding to the hemoglobin in red blood cells. 5. This pollutant contributes to the formation of photochemical smog and acid deposition. 6. A very high percentage of the emissions of this pollutant comes from coal combustion