by Adair Locke, MD. 1  Methylene blue is administered intravenously by anesthesia providers for a variety of clinical uses and may be used with increasing frequency as an intraoperative urologic marker dye due to an indefinite nationwide shortage of indigo carmine.
The Effects of Humidity on the Human Body. As discussed in Home Humidity and Allergies, humidity directly affects the amount of allergens in the indoor environment. In particular, high humidity causes both dust mite populations and mold colonies to grow, thereby greatly increasing allergy sufferers' total allergen load.
This combination of evaporation, condensation and precipitation is also known as the water cycle. Solar energy also heats the air and warm air can 'hold' more moisture, which increases the rate of evaporation. Wind speed is one example of how wind affects evaporation. Air temperature, water temperature and relative humidity are the other factors affecting the rate of evaporation. Understanding these concepts will provide a background to better understand weather, global warming and the water cycle. slide 4 of 4.