نتایج جستجو برای: pollution concentration

تعداد نتایج: 443080  

Defined as any substance in the air that may harm humans, animals, vegetation, and materials, air pollution poses a great danger to human health. It has turned into a worldwide problem as well as a huge environmental risk. Recent years have witnessed the increase of air pollution in many cities around the world. Similarly, it has become a big problem in Iran. Although ground-level monitoring ca...

ژورنال: سلامت و محیط زیست 2013
احمدی مقدم, مهدی, محمودی, پرویز,

Background and Objectives: Exceeding the standard level in most cases, Tehran air pollution has become a national environmental challenge. Therefore, it is crucial to analyze Tehran air-pollution data set during 2000-2009 for trend analysis. Materials and Methods: In this study, we collected the hourly data of Tehran air pollution during 2000-2009 recorded by monitoring station of Tehran Air P...

اسدزاده, سیده نسترن, دولتی, محسن, هاشمی, میترا, کرمانی, مجید,

Abstract Background and Objective: Air pollution can harm humans and the environment. To reduce the effect of these parameters in the emissions of air pollutants known to the local topographical features and climatic conditions are factors. The purpose of this study, monthly and seasonal variations are contaminants and their relationship with meteorological parameters. Methods: the presen...

Journal: :Epidemiology 1997
B Brunekreef N A Janssen J de Hartog H Harssema M Knape P van Vliet

The contribution of motorized traffic to air pollution is widely recognized, but relatively few studies have looked at the respiratory health status of subjects living near busy roads. We studied children in six areas located near major motorways in the Netherlands. We measured lung function in the children, and we assessed their exposure to traffic-related air pollution using separate traffic ...

Journal: :Biomedical and environmental sciences : BES 2009
Chang-Hong Chen Hai-Dong Kan Cheng Huang Li Li Yun-Hui Zhang Ren-Jie Chen Bing-Heng Chen

OBJECTIVE To investigate the potential impact of ambient air pollution on public health under various traffic policies in Shanghai. METHODS The exposure level of Shanghai residents to air pollution under various planned traffic scenarios was estimated, and the public health impact was assessed using concentration-response functions derived from available epidemiological studies. RESULTS Our...

Journal: :Biology letters 2010
Ming Nie Qiang Yang Li-Fen Jiang Chang-Ming Fang Jia-Kuan Chen Bo Li

Biomass allocation is an important plant trait that responds plastically to environmental heterogeneities. However, the effects on this trait of pollutants owing to human activities remain largely unknown. In this study, we investigated the response of biomass allocation of Phragmites australis to petroleum pollution by a ¹³CO₂ pulse-labelling technique. Our data show that plant biomass signifi...

2005
Yuan Zhou Richard S.J. Tol

Although China has made dramatic economic progress in recent years, air pollution continues to be the most visible environmental problem and imposes significant health and economic costs on society. Using data on pollutant concentration and population for 2003, this paper estimates the economic costs of health related effects due to particulate air pollution in urban areas of Tianjin, China. Ex...

2013
Zhaobin Sun Xingqin An Yan Tao Qing Hou

BACKGROUND Evaluation of the adverse health effects of PM10 pollution (particulate matter less than 10 microns in diameter) is very important for protecting human health and establishing pollution control policy. Population exposure estimation is the first step in formulating exposure data for quantitative assessment of harmful PM10 pollution. METHODS In this paper, we estimate PM10 concentra...

2013
M. Hasan S. Rahman P. K. Halder M. Alam M. A. Raquib M. A. Islam P. A. Khan

Mega cities in South Asia are an epitome of traffic snarls and resulting vehicular pollution. Dhaka, a center of polity and economy in Bangladesh, is no exception. This study is focused on the measurement of air pollution levels at traffic congestion and road in Dhaka City. The aim of this paper is to discuss the vehicle engine emissions and the technologies and methodologies available to help ...

1998
Maureen L. Cropper Nathalie B. Simon Anna Alberini P. K. Sharma

report the results of a time-series study of the impact of particulate air pollution on daily mortality in Delhi. They find: • A positive, significant relationship between particulate pollution and daily nontraumatic deaths, as well as deaths from certain causes (respiratory and cardiovascular problems) and for certain age groups. • In general, these impacts are smaller than those estimated for...

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