The maximum amount of water contained in air at various temperatures and pressure is indicated on a psychrometric chart. The carrying capacity changes with these parameters. The actual humididty can be read out from wet and dry bulb thermometer temperature measurement. However at 100% carrying capacity y the relative untidy is always 100 percent.
When a parcel of air is saturated with water vapor the relative humidity of that parcel of air is 100%.
100%
That would be "dewpoint"...When the air temperature falls to the dewpoint (or dewpoint rises to the air temperature), then you have 100% relative humidity.
warm
100%
humidity
humidity
When air is saturated at 30 degrees celsius
Saturated
100% if it is completely saturated.
Because the more pecentage of the Humidity the more saturated the air so clean air can get to you.
This is called relative humidity. It is the ratio between the actual humidity, and the humidity for saturated air - that is, the maximum amount of water air can hold. This saturation point is dependent on temperature.