Meteorological conditions, climate change, emerging factors, asthma and related allergic diseases. A statement from the World Allergy Organization. The prevalence of allergic airway diseases such as asthma and rhinitis has increased significantly in proportion to their prevalence worldwide. In addition to air pollution from industrial emissions and motor vehicles, this increasing trend can only be explained by general changes in the environment in which we live. These changes are thought to have a negative impact on respiratory health and to have increased the frequency and severity of respiratory diseases, such as asthma, in the general population. Increases in atmospheric concentrations of greenhouse gases, particularly carbon dioxide, have warmed the planet significantly, triggering more severe and prolonged heat waves, temperature changes, and increases in air pollution, forest fires, droughts and floods – all of which can put public respiratory health at risk. These changes in climate and air quality have a significant impact on the incidence of asthma and other respiratory diseases. This statement from the World Allergy Organization (WAO) presents the importance of this health hazard and highlights the fact that climate affects health, including: human mortality and acute morbidity due to heat waves and extreme weather events; increased frequency of acute cardiopulmonary events due to higher ground-level ozone concentrations; changes in the frequency of respiratory disease due to transboundary particle pollution; spatial and temporal distribution of allergens changes (pollen, molds, mites); and carriers of some infectious diseases. According to this report, these factors not only affect those with asthma, but also increase the incidence and prevalence of allergic respiratory diseases as well as asthma. The effect of climate change on respiratory allergy is not well explained and more research is needed to address this issue. Global warming is expected to affect the onset, duration and intensity of the pollen season on the one hand, and the rate of acute exacerbations of asthma due to air pollution, respiratory infections and/or cold air inhalation, and other conditions on the other.