The winter atmosphere is very dry. The amount of water vapor in the air is much less than in the saturated state. That means the humidity of the air is much less. Humidityy dapends on the amounnt of water vaporr in the airr. Humidity is a measure of how wet or dry the air is. The higher the amount of water vapor in the air, the higher the humidity, and the lower the humidity. A certain limit for holding water vapor in the air. This is called the saturated state of the air. When the air reaches a saturated state, it can no longer absorb water vapor.
If the humidity of the air is too close to the saturated state, the ability to absorb water vapor from other objects decreases. This means that when the air is more wet, its ability to absorb water vapor decreases.
On the other hand, the lower the humidity of the air, the greater its ability to absorb water vapor.
Humidity in winter is much lower than in summer. Due to this, the winter air is more dry. Therefore, the ability of the winter air to absorb water vapor is much higher. Winter air therefore absorbs water or water vapor from where it gets a chance. In winter, air can also absorb water from the human body through water vapor. In winter, the human body is basically wrapped in clothes. But hands-feet, lips etc. are open. The atmosphere chooses those parts of the human body to absorb water vapor. As a result, the skin of those places in the body becomes dry. Lack of adequate amount of water causes the skin to crack.
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