Watercress is fun and easy to grow at home. Take a look at our article showing you how to use the grocery store watercress to start your own patch of watercress at home. Hydroponic Water Cress. This is an image of commercially hydroponically grown watercress.
Fog is the extreme of humidity. Humidity control systems add or remove water vapor from indoor air to stay within proper humidity ranges. Humidity control is important for three reasons: 1  It is a large factor in people's thermal comfort.2  Excess moisture in a building can lead to mold and mildew, causing problems for indoor air quality.umidity control systems add or remove water vapor from indoor air to stay within proper humidity ranges. Humidity control is important for three reasons: 1  It is a large factor in people's thermal comfort.
Answers. Best Answer: Humidity is a function of temperature because the hotter it is the more moisture the air can hold. So, without adding water air that is cool and then warmed will lose relative humidity. In my greenhouse as daytime temps go from 50 to 120 relative humidity goes from about 35% to 5%.nswers. Best Answer: Humidity is a function of temperature because the hotter it is the more moisture the air can hold. So, without adding water air that is cool and then warmed will lose relative humidity. In my greenhouse as daytime temps go from 50 to 120 relative humidity goes from about 35% to 5%.