In a recent, cross-institutional study partially funded by the National Institutes of Health, researchers report that healthy human airways are at higher risk for dehydration and inflammation when exposed to dry air, an occurrence expected to increase due to global warming. Inflammation in human airways is associated with such conditions as asthma, allergic rhinitis and chronic cough.
Researchers say that as the Earth’s atmosphere heats up, with relative humidity staying mostly the same, a property of the atmosphere called vapor pressure deficit (VPD) increases at a rapid rate. VPD is a measure of how “thirsty” for water air can be. The higher VPD becomes, the greater the evaporation rate of water, thus dehydrating planetary ecosystems.
Based on mathematical predications and experiments, researchers…