Which of the following methods can help reduce concentrations of odors in indoor environments?

Air washers and scrubbers are effective solutions for reducing concentrations of odors in indoor environments. These devices work by actively filtering, purifying, and sometimes even humidifying the air. Air washers combine the functions of air filtration with water, using the principle that pollutants and odors can be absorbed or captured by moisture in the air. This not only reduces odors but also improves overall air quality by removing particulates and certain volatile organic compounds (VOCs).

Scrubbers, on the other hand, specifically target gaseous contaminants, using chemical or physical reactions to neutralize or remove harmful compounds from the air. By deploying these technologies, indoor environments can benefit from a more refreshing atmosphere with significantly lower levels of odors.

In contrast, options such as using heavy drapery may cover surfaces but do not effectively address the source of odors or improve indoor air quality. Reducing ventilation can lead to the accumulation of pollutants and increased odor levels, as stagnant air allows odors to linger. Increasing indoor temperature may also exacerbate odor issues since warmer air can hold more moisture and organic compounds, potentially intensifying any unpleasant smells.