1. Further chemicals released are benzene and 1, 3-butadiene that are also hazardous air pollutants . 2. Control of Hazardous Air Pollutants From Mobile Sources : Early Credit Technology Requirement Revision 3. Proposals for limiting hazardous air pollutants are still being intensively debated, participants in the process say. 4. Asbestos which often is present in older building materials is regulated as a hazardous air pollutant . 5. This method produces significant VOC ( volatile organic compound ) and HAP ( hazardous air pollutant ) emissions. 6. Mercury, a highly toxic element, was declared a hazardous air pollutant by the Environmental Protection Agency in 1971. 7. The National Emission Standards for Hazardous Air Pollutants program was created to expand much broader industries and activities. 8. A recent European study identified PM2.5 as the most health-hazardous air pollutant , causing an estimated 492, 000 premature deaths. 9. The objections are based on highly technical details of the controls to be imposed on emissions of hazardous air pollutants . 10. The public can use this index as a tool to determine their exposure to hazardous air pollutants based on visibility range.
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