Tolerance for Environmental Health Risks: The Influence of Knowledge, Benefits, Voluntariness, and Environmental Attitudes

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Abstract
This study examined factors affecting risk estimates and tolerance among persons directly exposed to environmental health risks. Data were gathered from questionnaires distributed at public hearings regarding proposed air pollution standards for an arsenic emitting copper smelter located in Tacoma, Washington. Approximately 80% of the area residents who attended the hearings completed the questionnaires, and the responses of 347 subjects were analyzed. Results indicated that informal risk estimates and risk tolerance were closely associated with judged benefits of the hazard source, acceptance or denial of vulnerability, judgments of exposure voluntariness, and environmental attitudes. Neither factual knowledge of formal risk estimates and proposed standards nor residential distance from the smelter was found to be closely related to risk tolerance or informal risk estimates. Implications of the results are discussed in relation to past and future studies of reactions to risk, and in relation to risk management policy and practice.

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