نتایج جستجو برای: pollution index
تعداد نتایج: 461981 فیلتر نتایج به سال:
فعالیتهای انسانی تجمع فلزات سنگین را در خاک افزایش خواهد داد. آلودگی خاک به طور قابل توجهی کیفیت محیط زیست را کاسته و بر سلامت انسان اثرگذار است. پژوهش حاضر با هدف تعیین غلظت برخی از فلزات سنگین (نیکل، سرب، آهن، روی، کروم، کادمیوم) و ارزیابی تأثیر فعالیت مجتمع فولاد کرمان بر غلظت فلزات سنگین خاک صورت گرفت. تعداد 60 نمونه ازخاک سطحی از عمق 15-0 سانتیمتری، در فواصل متفاوتی از مجتمع فولاد کرمان ...
Background: Air Quality Index (AQI) quantifies the relationship between air quality and the level of health. The value of AQI may be predicted using neural network model for a day in advance, based on the meteorological variables and autocorrelation behavior of the index in Kermanshah, a city in western Iran. Methods: Data for air pollution and meteorological variables, collected during thre...
Emissions from motor vehicle exhausts have been shown to have deleterious effects on the physiology of plant species. Our present study focuses on evaluating the tolerance and sensitivity of selected plant species viz. Dracaena deremensis (good absorber of VOCs) and Dianthus caryophyllus (susceptible to ethylene and formaldehyde (VOCs)) at selected sites which are differentiated on the basis of...
Background and Objective: Marine sediments are the most important component of monitoring the health of aquatic ecosystems. The present study uses sediment quality indices to determine the contamination status in Qeshm ecosystems and to evaluate the toxicity of the elements studied for its organisms. Materials and Methods: Sampling of surface sediments of seven stations was carried out on Qesh...
BACKGROUND Knowledge and practice about air pollution are essential subjects in special groups such as cardio-pulmonary patients. For children with air pollution-related diseases, knowledge and attitude of parents play a determining role in this respect. Since providing a coherent curriculum needs evidence-based information, this survey was conducted to assess the knowledge and practice of asth...
introduction: the process of urbanism in countries that are developing, like islamic republic of iran with increasing of the number and the size of cities and the fast accepting of population have been caused the forming of problems like an in-official economics and in-official settlement and was become creating high population in main and old places of city and increasing of air pollution and ...
Air pollution indices are commonly used to indicate the level of severity of air pollution to the public. The Pollution Standards Index (PSI) was initially established in response to a dramatic increase in the number of people suffering respiratory irritation due to the deteriorating air quality. The PSI was subsequently revised and implemented by the USEPA in 1999, and became known as the Air ...
Over the past decade, India has experienced rapid economic growth along with increases in levels of air pollution. Our goal is to examine how alternative policies for air pollution abatement affect well-being there. In particular, we estimate the effects of policies to reduce the levels of ambient fine particulates (PM2.5), which are especially harmful to human health, on well-being, quantified...
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