We estimate a negative binomial model with fixed effects to examine the impact of spatial differences in environmental regulation on manufacturing capital flows. Using a newly available data set, we find that stricter air quality standards with respect to ozone deter births of polluting plants, suggesting heterogeneity in regulatory standards may create a spatial browning process. We also find ...

Urban air pollution is associated with significant adverse health effects. Model-based abatement strategies are required and developed for the growing urban populations. In the initial development stage, these are focussed on exceedances of air quality standards caused by high short-term pollutant concentrations. Prediction of health effects and implementation of urban air quality information a...

In the forty years since the passage of the original Clean Air Act, urban air quality has improved significantly in the United States. Less than a century ago, the vast quantity of coal smoke emitted by urban industries was sufficiently great to obscure the sun, often requiring street lamps in the largest industrial cities to remain lighted throughout the day. Urban residents waged a losing bat...

Particulate matter (PM) models are used for demonstration of progress in visibility under the Regional Haze Rule and the formulation of State Implementation Plans (SIPs) for the PM2.5 National Ambient Air Quality Standards (NAAQS). For models to be used convincingly in the regulatory arena, they must first be shown to produce satisfactory performance . The evaluation of models is a data-intensi...

. A direct comparison was made between the air-kerma standards used for the measurement of low-energy x rays at the National Institute of Standards and Technology (NIST) and the Bureau International des Poids et Mesures (BIPM). The comparison was carried out at the BIPM using the BIPM reference beam qualities in the range from 10 kV to 100 kV. The results show the standards to be in agreement t...

a general overview on the prospective of various oxidation and combined processes in the treatment of tannery industry effluent are reported. various oxidation and combined processes such as uv/h2o2/hypochlorites, fenton and electro-oxidation, photo-chemical, photo-catalytic, electro-catalytic oxidation, wet air oxidation, ozonation, biological followed by ozone/uv/ h2o2, coagulation or ele...

ABSTRACT: Smoke haze related to biomass burning is a recurring environmental problem in Southeast Asia which has affected air quality not only in the source regions, but also in the surrounding areas. Air quality monitoring stations and meteorological stations in the region provide valuable information on the concentrations of criteria pollutants such as sulphur dioxide, nitrogen oxide, carbon ...

long recognized.3-5 Consequently, there has been a growing interest in investigating what changes in air quality may be brought about by the possible future changes in climate. The common assumption has been that warmer temperatures accompanying climate change will enhance pollution. However, due to the complex interplay of meteorology and chemistry in the formation of pollutants such as PM2.5 ...