Climate change and respiratory diseases

Changes in climate constitute a reality that, according to recent projections, is going to worsen in the coming years. Climate change represents a massive threat to respiratory health: 1) by directly promoting or aggravating respiratory diseases; or 2) by increasing exposure to risk factors for respiratory diseases. Climate change increases the amount of pollen and allergen produced by each plant, mould proliferation and the concentrations of outdoor ozone and particulate matter at ground level. The main diseases of concern are asthma, rhinosinusitis, chronic obstructive pulmonary disease (COPD) and respiratory tract infections. Groups at higher risk of climate change effects include individuals with pre-existing cardiopulmonary diseases or disadvantaged individuals. Adaptation and mitigation measures are strongly needed. It is now widely accepted that the earth’s temperature is increasing, as confirmed by warming of the oceans, rising sea levels, glaciers melting, sea ice retreating in the Arctic and diminished snow cover in the Northern Hemisphere. Moreover, changes are also occurring in the amount, intensity, frequency and type of precipitation, as well as the increase of extreme weather events, such as heat waves, droughts, floods and hurricanes [1–3]. Most of the observed increase in globally averaged temperatures since the mid-20th century is probably due to the observed increase in anthropogenic greenhouse gas (namely carbon dioxide, methane and the nitrous oxides) concentrations [1]. Projections of future greenhouse gas emissions indicate a worsening of the situation with between a 1.1 and 6.4°C increase in the mean temperature by the end of the 21st century [1]. Climate change represents a massive direct threat to respiratory health by promoting or aggravating respiratory diseases or indirectly by increasing exposure to risk factors for respiratory diseases [4]. Climate affects weather, air and water quality, local and national food supplies, economics …