Human response to odor is also based on the community, meteorology, and topography interactions. An odor with an acceptable hedonic tone and low intensity can generate complaints when the odor character is unfamiliar, causing concern with the toxicity. Conversely, some high intensities of hedonically unpleasant odors are tolerated because they are considered socially acceptable. Even pleasant odors, such as perfumes or roasting coffee, are considered objectionable if they persist for a long time or are frequently present.
Demographically, awareness of air pollution problems increases with education, income and occupational level, and age. Some of this awareness is also based on economic factors, such as property values.
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