Humidity and cloud coverage significantly weaken PDRC effectiveness. A study by Huang et al. noted that "vertical variations of both vapor concentration and temperature in the atmosphere" can have a considerable impact on radiative coolers. The authors put forth that aerosol and cloud coverage can also weaken the effectiveness of radiators and thus concluded that adaptable "design strategies of radiative coolers" are needed to maximize effectiveness under these climatic conditions. Regions with high humidity and cloud cover have less global cooling potential than areas with low humidity and cloud cover.