With the increase in all types of activity modern man, huge amounts various pollutants are thrown into air every day. The atmosphere has capacity to absorb certain gaseous and particulate due its dynamic nature.

This study investigated the acquisition of grammatical aspect by Iranian EFL learners. The main question addressed in this study was whether Iranian EFL learners could distinguish conditions under which they must use either the perfective aspect  or imperfective aspect. A group of 110 adult, Persian-Speaking learners of English both at BA and MA levels Took a Michigan test based on which they w...

in order to determine optimum landuses (in accordance with natural capability) and improve the current land management, landuse planning process was applied by using gis. within the framework of system analysis approach basic ecological and socio-economic , data were mapped. the mapped data were digitized and imported to idrisi and arc/info to build a database ,along with other descriptive data...

Urbanization and intensive economic activities growth are closely related. On the other hand, economic, especially industrial cause pollution of urban areas. In spite that risk for human health, people strive to live in conditions which offer more chances improved quality life. this paper connection between healthy issues investigated. To determine rate attractiveness complexes authors introduc...