Air is the component of the environment in which harmful elements propagate rapidly on extended spaces. Achieving higher efficiency in economic activities has made the human being to interfere directly or indirectly in the evolution of many climate elements, provoking a lot of local and regional mutations that ,by cumulation, begin to influence the state of the climate on large territories, including the globalal level. The large number of local climate changes are linked to the creation of specific microclimates (greenhouse, urban, rural, industrial platforms, etc.), mainly focused on changes in temperature, humidity, calm state.