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Humidity and temperature are two of the most important environmental factors affecting the success of any indoor or outdoor activity.

Humidity is a measure of the amount of moisture in the air. The temperature and humidity of the environment significantly affect the human body, the performance of mechanical and electronic systems, and even the ecological balance of the environment. High humidity or low temperature can cause discomfort, cause clothes to wrinkle, and even affect the growth of microorganisms in food.

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Humidity can be pided into absolute humidity, relative humidity, water vapor pressure, and a variety of other variables. Absolute humidity is the mass of water vapor contained in a unit volume of air, and is usually expressed as grams per cubic meter (g / m3). Relative humidity is the ratio of water vapor contained in the air to the maximum value contained in a unit volume at a given temperature and is usually expressed as a percentage. Water vapor pressure is the pressure exerted by water vapor in the atmosphere.

Humidity has a great influence on the human body. When the relative humidity is too low, people's skin will lack moisture, and the skin will become dry and tight, and the skin will become more prone to wrinkles. In addition, when the air humidity is too low, the nasal mucosal linings will be easily irritated and secrete a thin, watery liquid. When the relative humidity is too high, people will feel uncomfortable and hot, air breathing will become difficult, and the human body's heat dissipation function will also be hindered.

The ideal relative humidity should be between 40% and 50%. In this range, you can feel comfortable and the skin will retain moisture and not dry out. In areas with high temperatures, the relative humidity should be kept above 65%. In colder areas, the relative humidity should be kept below 35%.

Temperature is an important environmental factor that affects our lives and physical environment. Temperature is the average kinetic energy of molecules. The higher the temperature, the faster the molecules move and the higher the temperature. It is an important parameter to measure the physical or chemical characteristics of an object. Temperature affects most outdoor activities. When the temperature is too low, people's body temperature will drop, and they will feel cold and uncomfortable. When the temperature is too high, people's body function will speed up and their metabolism will increase, causing them to sweat and feel very hot.

In addition, temperature is also an important factor that affects the growth of microorganisms and crop cultivation. Too cold or hot can delay the growth of bacteria, while too high or too low temperature can cause failure in the breeding of crops.

Therefore, the temperature and humidity of the environment should be adjusted appropriately. While ensuring the comfort of living environment, it can also make crops grow better and reduce the occurrence of disease.