نتایج جستجو برای: air pollutants

تعداد نتایج: 223139  

Meteorological parameters play a significant role in affecting ambient air quality of an urban environment. As Dhaka, the capital city of Bangladesh, is one of the air pollution hotspot among the megacities in the world, however the potential meteorological influences on criteria air pollutants for this megacity are remained less studied. The objectives of this research were to examine the rela...

Journal: :Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia 2012
Marcos Abdo Arbex Ubiratan de Paula Santos Lourdes Conceição Martins Paulo Hilário Nascimento Saldiva Luiz Alberto Amador Pereira Alfésio Luis Ferreira Braga

Over the past 250 years-since the Industrial Revolution accelerated the process of pollutant emission, which, until then, had been limited to the domestic use of fuels (mineral and vegetal) and intermittent volcanic emissions-air pollution has been present in various scenarios. Today, approximately 50% of the people in the world live in cities and urban areas and are exposed to progressively hi...

2012
Francesco Pilla Eoin King Brian Broderick Rex Britter

Recent EU legislation has placed a focus on the assessment of environmental pollutants and informing the public of their own exposure levels. This paper investigates the possibility of using a network of sensors to monitor pollutants using Dublin city as a test case. Air and noise pollution are modelled and the distribution of network nodes is determined from prediction results with a focus on ...

Journal: :Plant Physiology 1984

B. Mohammed Hashim M. Abdullah Sultan

The research used the satellite image (Landsat 7 ETM ) within the thermal infrared sixth band (TIR6) and geographic information system (GIS) to determine the air pollution and its relationship with the land cover (LC) and land use (LU) of Baghdad city. Concentration of total suspended particles (TSP), lead (Pb), carbon oxides (CO, CO2), and sulphur dioxide (SO2) were obtained from 22 ground mea...

Journal: :The European respiratory journal 1995
T Sandström

Epidemiological and environmental chamber studies in man, and toxicological studies in animals, have provided valuable insights into the biological effects, the mechanisms of action, and the dose-response characteristics of some major air pollutants. This review describes the information currently available on air pollutant effects in man, as the result of experimental studies. There are certai...

Journal: :New solutions : a journal of environmental and occupational health policy : NS 2006
Joan N Parker

While 31 million Americans have been diagnosed with asthma, children are most severely affected. Asthma also is common among teachers, indicating that the school building environment may be associated with asthma prevalence among occupants. Children are sensitive to environmental pollutants, which are more concentrated in indoor air environments. Schools are a significant source of indoor air p...

Journal: :Journal of environmental monitoring : JEM 2003
Khaiwal Ravindra Suman Mor C P Kaushik

The effect of fireworks on air quality was assessed from the ambient concentrations of various air pollutants (SO2, NO2, PM10 and TSP) during Diwali festival in Hisar city (India), in November 1999. The extensive use of fireworks was found to be related to short-term variation in air quality. During the festival the concentration of SO2 was observed to be increased approximately 10-fold at few ...

2006
Mahmoud Bady Shinsuke Kato Hong Huang

ABSTRACT: This paper deals with the determination of the ventilation efficiency (VE) indices, Purging Flow Rate, Visitation Frequency, and Staying Time of air pollutants, inside a domain located within an urban area. For the purpose of study, a wind environment of 100 x 100 x 75 m volume was considered and a two building model inside was adopted to perform the calculations. A void was construct...

Journal: :MEDICC review 2016
Silvia J Venero-Fernández

WHO considers the effects of air pollution one of the most pressing global health priorities. Several years ago, scientists began noting a link between Saharan dust (a meteorological phenomenon that diminishes air quality as it spreads over the globe) and some diseases, but the few studies to date have been inconsistent. Cuba has the human and material resources to study the association between...

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