نتایج جستجو برای: environment pollution

تعداد نتایج: 576630  

2017
Manhong Shen Yongliang Yang

Boundary environmental pollution and pollution spillovers are important issues for improving the water quality of trans-boundary rivers. This paper explores the empirical effects of the evolution of the pollution reduction mandates on boundary pollution by studying the change of water pollution levels (as proxied by pH, BOD, COD and NH3-N) of key state monitoring stations from 2004 to 2014. The...

Journal: :international journal of occupational hygiene 0
ali asghar alesheikh faculty of geomatics engineering, k. n. toosi university of technology, vali-e-asr st., mirdamad cross, tehran, iran manouchehr omidvari faculty of industrial and mechanical engineering, islamic azad university, qazvin branch, qazvin, iran

large urban areas are facing growing problems of noise pollutions. geospatial information systems (gis) can conveniently be adapted to gather, analyze and present noise information. gis can also be extended to answer to user specific problems through deterministic and statistics models. the objectives of this research were to measure urban traffic noise levels, analyze temporal and spatial dyna...

Journal: :Arhiv za higijenu rada i toksikologiju 2013
Andreja Kukec Jerneja Farkas Ivan Erzen Lijana Zaletel-Kragelj

The aim of this study was to estimate the population burden of respiratory diseases in the Zasavje region of Slovenia that can be attributed to outdoor air pollution in order to gain relevant grounds for evidence based public health activities. In 2008, 981 schoolchildren (age 6 to 12 years) were observed in a prevalence study. The prevalence of chronic respiratory diseases (CRD) and frequent a...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
Bronwyn C Galletly Mark W Blows Dustin J Marshall

Pollution is a common stress in the marine environment and one of today's most powerful agents of selection, yet we have little understanding of how anthropogenic toxicants influence mechanisms of adaptation in marine populations. Due to their life history strategies, marine invertebrates are unable to avoid stress and must adapt to variable environments. We examined the genetic basis of pollut...

2004
Yutaka Yoshino

This paper formulates a two-country economic geography model of trade and the environment, in which “entrepreneurs” who own capital are internationally mobile under monopolistic competition. When the environmental policy is predetermined, the model follows the traditional economic geography prediction where industries agglomerate in one country above certain level of trade openness. Moreover, w...

Journal: :ecopersia 2015
maryam nasrollah pourmoghadam soheil eagdari bagher mojazi amiri hadi poorbagher nima nemati mobin

the pollution of aquatic ecosystems may affect natural reproduction of fish populations by decreasing the fertilization efficiency. among the various sources of pollution, heavy metals are important group, being found in both freshwater and marine environment. the present study investigated changes of sperm characteristics of caspimyzon wagneri when exposed to manganese (mn). spermatozoids were...

Journal: :international journal of marine science and engineering 2013
m. kashefiolasl h. zargarlelahi

pollution of marine waters is one of the important issues that has a irreparable effects. also, in the organic oil pollutants, due to inappropriate effects on the environment and humans health and ability to create cancer, hydro carbons of polycyclic (pahs) and heavy metals (ni,hg,v) have a particular importance. according to the importance of study of the environ mental contaminants in the fou...

2015
Susanne Soretz Ingrid Ott

We analyse the interdependence between green attitude and equilibrium development of environmental quality in an endogenous growth model. Individuals take only part of their impact on pollution into account, hence there is a negative externality of capital accumulation on environmental quality. Increasing wealth or increasing pollution enhance green attitude and reduce the externality, because ...

Journal: :Remote Sensing 2017
Wenli Xiang Minghong Tan

The natural nighttime light environment of the earth has been significantly transformed by human activities. Such “light pollution” has a profound influence on ecosystems. Protected areas (PAs) play key ecological functions and are only effective at low light pollution levels or without any light pollution. In China, with rapid population growth and high urbanization rates, light pollution in P...

2015
Davide La Torre Danilo Liuzzi Tufail Malik Oluwaseun Sharomi Rachad Zaki

A deterministic model of economic growth and pollution accumulation, in the form of a system of partial differential equations, is designed and analyzed. The model assumes pollution as a by-product of production. The stock of pollution has a negative impact on production. The accumulation of pollution is dampened by a share of the investments, in the form of an environmental tax. We consider a ...

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