introductionair pollution is the introduction of particulates, biological molecules, or other harmful materials into the earth's atmosphere, possibly causing disease, death to humans, damage to other living organisms such as food crops, or the natural or built environment. the atmosphere is a complex natural gaseous system that is essential to support life on planet earth. stratospheric oz...

Public concerns related to air quality impacts of intensive livestock and poultry operations have grown drastically over the recent years. Pollutants of concern are particulate matter, ammonia, methane, hydrogen sulfide, volatile organic compounds, and odors. However, there is a general paucity on character, amount, and dispersion of livestock air pollutants. Despite dramatic knowledge gaps, th...

We have constructed a pulsed corona discharge system for the removal of air pollutants, such as NOx, SOx and volatile organic compounds (VOCs), in which an emission spectrometry is employed to characterize the generation of excited species by the corona discharge process. Special attention has been paid to overcome noise problems from high voltage power supply, which hampers the measurement of ...

the environmental kuznets curve (ekc) hypothesis posits an inverted u relationship between environmental pollutants and per capita income. recent researches have examined this hypothesis for different pollutants in different countries. however, so far a few number of ekc studies have been carried out in iran. this might be due to the lack of reliable environmental data in this field. the aim of...

It is important to understand the effects of emission controls on concentrations of ozone, fine particulate matter (PM2.5), and hazardous air pollutants (HAPs) simultaneously, to evaluate the full range of health, ecosystem, and economic effects. Until recently, the capability to simultaneously evaluate interrelated atmospheric pollutants ("one atmosphere" analysis) was unavailable to air quali...

Establishment of emission standards is an important measure for controlling vehicle exhaust. This study examined the emission factors of air pollutants from 40 four-stroke motorcycles of various emission standard phases, ages, and mileage. Based on the emission standards, the motorcycles were divided into three groups (Phases III, IV and V). Regulated air pollutants (CO, HC, and NOx), CO2, and ...

Air pollution recieves one of the prime concern in India, primarily due to rapid economic growth, industrialization and urbanization with associated increase in energy demands. Lacks of implementation of environmental regulations are contributing to the bad air quality of most of the Indian cities. Air pollutants produced in any air shed are not completely confined, but at time trespassing all ...