the centralization of human activities is associated with different pollutants which enter into environment easily and cause the urban environment more vulnerable. regarding the importance of air pollution issue for tehran metropolis, many plans and regulations have been developed. however, most of them failed to decline the pollution. the purpose of this study was to pathologically analyze air...

Environmental pollution consists of different types of pollutants in air, soil, and water. Due to the fact that plants can respond to environmental pollution, they can be used as bio-indicators for environmental monitoring. Air pollution in areas with oil and gas refineries nearby is an important problem. This study aims to survey the effects of gas refinery air pollutants on Conocarpus erectus...

Air pollution is one of the major threats to environment in the present time. Increase in degree of urbanization is a major cause of this air pollution. Due to urbanization, vehicular activities are continuously increasing at a tremendous rate. Mobile or vehicular pollution is predominantly degrading the air quality worldwide. Thus, air quality management is necessary for dealing with this seve...

The 1970s spawned a 'first generation' of growth controls which featured explicit (or implicit) restrictions on residential housing construction. These restrictions were gpically implemented in small, affluent, and predominantly white suburban communities. Policy analysis responded by focusing almost singlemindedly on how such supply-side restrictions might increase housing prices and drive out...

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 ...