“…These materials from pollen that contribute in interaction pollen-stigma can function as allergens, environment molecules interacting with the human immune system to elicit an allergic response in susceptible individual (Knox & Suphiohlu, 1996). Of all things that can cause an allergy, pollen is one of the most abundant and inescapable (Lokaj-Berisha et al, 2009, as cited in Shazo, 2000. As for the health effects of air pollution in subjects living in polluted urban areas, it has been found, both in US (D'Amato, 2002;as cited in Dockery et al, 1759;Schenker, 1993) Seaton et al, 1995) hypothesized that fine particulate of urban areas, penetrating deep into airways, is able to induce alveolar inflammation which is responsible for variation in blood coagulability and release of mediators which induce acute episodes of respiratory and cardiovascular diseases.…”