The study notes that «It is not physically possible for large enough volumes of air to interact with the surface
under normal atmospheric conditions and therefore this method will not remove sufficient molecules of NO2 to have a significant impact on ambient concentrations.»
At sea level, at a temperature of 21 degrees Celsius (70 degrees Fahrenheit) and
under normal atmospheric conditions, the speed of sound is 344 m / s (1238 km / h or 770 mph).
These common chemical compounds evaporate
under normal atmospheric conditions, compromising indoor air quality.