نشریه مطالعات علوم محیط زیست
سال دوم شماره 2 (تابستان 1396)

Requires efficient management of environmental laws and regulations that primarily deal with economic and social systems conformity and, second, in accordance with the facts and be able in society, namely the realization of the program environment, healthy and sustainable, legal instruments provide necessary. The research method in this study, survey of the population are lawyers in Tehran. Simple random sampling method and sample size was determined using a sample of 378 people. Data were collected by questionnaire and SPSS version 22 software is data analysis. The results showed with 99 percent confidence level we can say that this research advisory partnership in the fight against air pollution is as good. Accordingly, in order to improve the dynamic level of participation, consultation rules and regulations to fight air pollution is proposed to develop the ability to express voiceless people and provide opportunities for growth and responsibility and greater participation of the people and advising people on the environment, create be.

Sustainable agriculture has been defined as a successful management of agricultural resources to meet the changing needs of humans, protecting the environment and increasing biological resources. The purpose of this study was to identify and evaluate the factors affecting the stability of the agricultural system, which has been carried out as a case study in rural areas of the central part of Dehdasht County. The type of research is applied and the research method is descriptive-analytic. Information gathering tools, library and field information analysis, and parametric and non-parametric statistics have been used. The statistical population of the research is supervisors of rural households in the central part of Dehdasht County. The results of SPSS software show that five socio-participatory factors, infrastructure support, ecological, economic productivity and sustainable land use operations can explain more than 85% of the variance of agricultural system stability, paying attention to these factors in planning it seems necessary

The effect of air pollution on some physiological responses on three plants Ulmus, Acer and Platanus were studied. The leaf samples of clean and pollutant areas from cars were harvested at the same time from nearly the same size of examined plants with three replications for each plant and eight leaves for each replicate from third leaf of different wing and then transferred to the laboratory. The physiological and biochemical responses like chlorophyll, proline, and antioxidant and lipid peroxidation using spectrophotometry were measured. The results showed that the amount of proline was increased significantly with 5 percent in pollutant areas. Antioxidant potential of the plants has no significant differences in pollutant and clean area. Air pollution significantly reduced the amount of chlorophyll, carotenoid and anthocyanin and increased lipidproxidation. Differences of physiological indexes in Ulmus were more resistance than Acer and Platanus that may be related to morphologic and genetic characteristics. Daily increasing of cars and releasing of different pollutants to air caused Shiraz city air pollution. It has negative effect on plants.

The purpose of this study was to investigate and identify the most important parameters affecting the climate of Ahwaz. The research methodology was descriptive-analytic using Minitab, spss19 Excel 2013 software. In this research, 30 meteorological parameters were selected from the long-term data of Ahwaz synoptic station for the period of 45 years from 1960-2005 to determine the most important parameters influencing the formation of climate change in Ahwaz. Then, by factor analysis, the number of variables in seven main factors was the number of days of the semi-cloud, the number of cloudy days, the total monthly precipitation, the number of days with lightning storms, the number of days with an average rain or more than 5 mm, the maximum daily rainfall and average temperature The dry matter is 18/28, 17/846, 13/402, 9/680, 7/403, 6/307 and 5/572 respectively, in total, 83/128 percent of the variance, respectively. Subsequently, using time-series models, the results show that the total monthly precipitation, the number of days with rain equal to or greater than 1, 5 and 10 mm, the number of days with a temperature of maximum 30 degrees C and above, The number of days at least 4 ° C and lower, the average relative humidity, the average water vapor pressure, the average wind speed and the number of days of dust can be the most important parameters in predicting the climate change of the Ahwaz station.

Arsenic is one of the most toxic pollutants in soil and groundwater which threaten human and other organsms health. In the present study, the effect of growth promoting bacteria on reducing toxicity from arsenic on biochemical traits and nutrients uptake via canola plant were evaluated. For this purpose, soil samples with medium texture selected from Ardebil and after determination of its physiochemical traits, a pot experiment was conducted as facterial based on ompletely randomized design. Various arsenic levels applied in soil and after two months, soil samples were inoculated with PGPR and canola was cultivated. Results were analyzed by MSTAT-C softaware. Results showed that increasing arsenic level resulted to decreasing trend in total chlorophyll content, so that in the highest arsenic concentration, lowest total chlorophyll content observed by 8.9 mg/g leaf. Alos, according to the results, highest magnesium content obtained in pseudomonas putida inoculation and control (without arsenic) and the lowest amount was for azosprillium and 30mg/kg arsenic level. Totally, use of plang growth promoting bacteria caused improvement in plant biochemical traits and increasing nutrients uptake.

In this paper, the international standards on Radio Frequency Exposure investigated based on public and occupational categouries. Here, their exposure level presented in three main frequency bands: AM, VHF and UHF. Clearly, the calculations done based on two Hypothetical frequencies, 862 MHZ in UHF band and 1500 KHz in AM band to achieve exact standards’ level. Finnaly, the allowed exposure level of different standards compared to each other. According to the results, stringest standards are ANSI/IEEE C95/1 in VHFand AM frequency bands and Russian standard in UHF frequency band 0.2(mW/cm2) power density.
The easiest standards are American Conference of Governmental Industrial Hygienists (ACGIH) in VHF frequency band, Safety code 6(Canada) in UHF band with 28.72 (mW/cm2) power density and Federal Communication Commission (FCC) and ACGIH in AM band.
Finally, the most important reasons to have different standards in the world explained. The Iranian national standard is based on International Commission on Non-Ionizing Radiation Protection (ICNIRP).

Housing as one of the man-made phenomena has the characteristics that has a great effect on the functions and satisfaction of its users. Therefore, characteristics such as optimal shape, strength, security, safety, availability of residents to facilities, and the provision of the equipment and infrastructure needed for housing are effective in housing quality (Sajadi Khedari et al., 1394). Housing and its conditions are an important factor in the quality of life and the distinction between individuals, groups and regions (Shakouri and Asgari, 2012); in other words, housing is the basis for the development of the socio-economic development of its inhabitants and its quality with development Tangible and their needs are related (Motie Langroudi and Bakhtiali, 2011). Today, among the basic problems of rural dwellings in the country, their low quality is considered as a method of construction and use of good construction materials (Shahbazi, 2010). Due to the availability of home-grown raw materials, often supplied from local sources, villagers are building housing, which ultimately does not meet the housing standards, hence paying serious attention to the quality and quantity of housing Rural villages are necessary in rural development programs, because proper and standard housing is one of the rural development indicators (Lotfi et al., 2010).