Nitric oxide is a colorless and odorless gas, whereas nitrogen dioxide is a red-brown pungent gas. Although unlikely, high concentrations of NO can attach to hemoglobin and decrease the transport of oxygen. NO 2 can be more harmful to human health. Sources of hydrocarbons are landfills, automobiles, and burning of fossil fuels. Exposure to CO decreases the transport of oxygen to tissues and primarily affects the cardiovascular and nervous systems.
Ozone can enter the troposphere through natural and anthropogenic means.
During times of turbulence in the atmosphere, ozone found in the stratosphere can enter the troposphere. Ozone enters the troposphere primarily through photochemical reactions with pollutants that humans produce with sources such as automobiles and factories. Exposure to ozone can cause irritation to the eyes and respiratory system. This lab is important to students so they may realize the importance of reducing air pollution, both for the environment and the company. Companies and organizations, such as Corpus Christi Army Depot, must not emit more air pollution than EPA regulates.