Indoor air pollution is a serious health hazard in the United States. Carbon dioxide, the most dangerous indoor air pollutant, comes primarily from improperly used heating appliances, particularly unvented heaters. Studies have also shown adverse health effects from a number of volatile organic compounds, including formaldehyde, chlorination by-products, and polybrominated diphenyl ethers, that are frequently found at unhealthy levels in many buildings. Additional indoor health threats come from mites and molds, and from indoor dust, found to some extent in every home. Many...
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