Relative humidity
, , , and . "Adsorption and photocatalytic oxidation of formaldehyde on a clay-TiO2 composite." Journal of Hazardous Materials 212-212 (2012) 233–239.
, , and . Effect of Residential Ventilation Techniques for Hot and Humid Climates on Indoor Concentrations of Volatile Organic Compounds. Lawrence Berkeley National Laboratory, 2005.