Humidity is defined as the amount of water in the Earth's atmosphere. It is measured by the wet and dry bulb hygrometer.
When humidity is low, land organisms and trees tend to loose more water than when it's high. Plants loose water from parts such as leaves and bark and land organisms loose water from their their skin.
People here in America are used to more personal space because it is not over populated. But in other countries with crowed houses and overpopulation you would not even be able to walk in your own space.
