Nitrogen dioxide occur when fuel is burned at high temperature. Cause ozone gas in the ground level (Smog) who work outside the home. Which when exposed for long periods of time on a regular basis. It will make the destruction of lung, lung function and reduced acid rain Nox Sox able to ทำปฏิ engine with other substances in the air caused the acid. Water quality worse. That were Nitrogen in high water, especially around the coast. Make noise, balance of nutrients in the water. And the most important greenhouse gas emissions (Greenhouse effect).