Introduction Conclusions References Tables Figures

Ambient (outdoor) air pollution is now recognized as an important problem, both nationally and worldwide. Our scientific understanding of the spectrum of health effects of air pollution has increased, and numerous studies are finding important health effects from air pollution at levels once considered safe. Children and infants are among the most susceptible to many of the air pollutants. In a...

Ambient (outdoor) air pollution is now recognized as an important problem, both nationally and worldwide. Our scientific understanding of the spectrum of health effects of air pollution has increased, and numerous studies are finding important health effects from air pollution at levels once considered safe. Children and infants are among the most susceptible to many of the air pollutants. In a...

The question "can the approach used for radiation protection standards, i.e., to extrapolate dose--response relationships to low doses, be applied to combustion pollutants?" provided a basis for discussion. The linear, nonthreshold model postulated by ICRP and UNSCEAR for late effects of ionizing radiation is described and discussed. The utility and problems of applying this model to the effect...

The environmental problems we face today are multifold and complex. The emission of pollutants in the atmosphere, the discharge of effluents in lakes and rivers, the disposal of hazardous materials in ecosystems, and the use of pesticides on crops and food products are serious problems that are not yet fully understood. More recently, the industrially advanced nations of the world have been con...

Volatile organic compounds (VOCs) are liquids or solids that contain organic carbon (carbon bonded to carbon, hydrogen, nitrogen, or sulfur, but not carbonate carbon as in CaCO3 nor carbide carbon as in CaC2 or CO2), which vaporize at significant rates. VOCs are probably the second-most widespread and diverse class of emissions after particulates. VOCs are a large family of compounds. Some (e.g...

The major pollutants emitted from spark ignition (SI) engine are carbon monoxide (CO) and unburnt hydrocarbons, nitrogen oxides which are hazardous to human beings and environment. If the engine is run with alcohol blended alternate fuels, aldehydes are emitted as significant pollutants, which are carcinogenic and harmful in nature. Hence, control of these aldehyde emissions call for immediate ...

This paper discusses the issues of measuring formaldehyde on rich burn natural gas engines typically used in the gas compression industry in the United States. Recently, the EPA passed the final rule for reciprocating internal combustion engines to meet the national emission standards for hazardous air pollutants (i.e. RICE NESHAP rule) for both compression ignition (CI) and spark ignited (SI) ...