A primary pollutant is one that is formed in the atmosphere as a result of chemical reactions. Is this statement true or false?

The statement regarding a primary pollutant is false because primary pollutants are substances that are directly emitted into the atmosphere from a source, such as vehicles, industries, and natural events like wildfires. These pollutants include carbon monoxide, sulfur dioxide, and nitrogen oxides. They are not the result of chemical reactions in the atmosphere; rather, they are produced and released directly from the point of origin.

In contrast, secondary pollutants are formed through chemical reactions in the atmosphere, such as ozone, which is created when primary pollutants react in the presence of sunlight. Understanding the distinction between primary and secondary pollutants is essential for environmental health assessments and regulatory measures aimed at air quality management.