Passage of the 1990Amendments to the Clean Air Act made it clear that maximum available control technology (“MACT”) regulations on the emission of hazardous air pollutants (“HAPS”) from process heaters and industrial boilers, used extensively in the petroleum and petrochemical industries, would be promulgated under congressional mandate by the U. S. Environmental Protection Agency in the year 2...

ii Selected abbrevations iv Sammanfattning på svenska v Original Papers vi Introduction 1

Problems associated with estimation of human exposure to ambient air pollutants are discussed. Ideally, we would prefer to have some indication of actual dose. For most pollutants this is not presently feasible. Specific problems discussed are adequacy of outdoor monitors; the need to correct for exposures and time spent indoors; the need to have particle size distributions described and the ch...

In consideration of China’s enormous trade volumes since opening up and huge trade surplus especially with the developed countries, it is worried that the environment is sacrificed in the process of trade liberalization in China. Employing the environmental input-output analysis, this paper attempts to investigate whether international trade aggravates the environmental issues. Comparing pollut...

An aerosol light detection and ranging (LIDAR) system was used to measure the depth of the atmospheric mixing layer over Taipei, Taiwan in the spring of 2005. This paper presents the variations of the mixing height and the mixing ratios of air pollutants during an episode of air quality deterioration (March 7-10, 2005), when Taipei was under an anti-cyclonic outflow of a traveling high-pressure...