Question

The largest sources of NOx pollution are?

1) electric power plants and motor vehicles
2) electric power plants and industry
3) industry and motor vehicles
4) smelters and motor vehicles

Answer 1

2) electric power plants and industry. Nitrogen oxides (NOx) are pollutants that include compounds such as nitric oxide (NO) and nitrogen dioxide (NO2).

Step-by-step explanation:

2) electric power plants and industry. Nitrogen oxides (NOx) are pollutants that include compounds such as nitric oxide (NO) and nitrogen dioxide (NO2). The largest sources of NOx pollution are primarily associated with human activities. Electric power plants and industrial processes are major contributors to NOx emissions. Combustion of fossil fuels in power plants and industrial facilities releases nitrogen oxides into the atmosphere. Additionally, motor vehicles, especially those with internal combustion engines, contribute significantly to NOx pollution. While option 1 is also partially correct, option 2 more comprehensively encompasses the major sources of NOx pollution, capturing the significant role of both electric power plants and industrial activities in the release of nitrogen oxides into the air.