Which of the following is a characteristic of Volatile Organic Compounds (VOCs)?

The correct choice highlights that Volatile Organic Compounds (VOCs) contribute to the formation of ozone and smog. VOCs are organic chemicals that have a high vapor pressure at room temperature, leading them to evaporate quickly into the air. When VOCs are released into the atmosphere, they can react with nitrogen oxides (NOx) in the presence of sunlight to produce ground-level ozone, a primary component of smog. This process is significant in urban areas with heavy traffic and industrial activity, where the concentration of these compounds can be particularly high, contributing to poor air quality and associated health risks.

VOCs are commonly emitted by a variety of sources, including paints, solvents, fuels, and even everyday products like cleaners and air fresheners. Understanding their role in air pollution is crucial for developing strategies to mitigate their impacts on both human health and the environment.