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.
A: Air conditioners perform two basic functions: heat removal and moisture removal. Even in Arizona, we have a monsoon season with higher-than-normal humidity levels. The lower the humidity level, the more comfortable you will feel at a given temperature. As your warm indoor air is drawn up through the filter, it passes over a very cold coil whereby the heat and moisture are removed.