Humidity is the amount of water vapour present in air.It is an important requirement for the atmosphere.The presence of water vapor makes our atmosphere unique.It encouraged and protected life on earth as it developed, not only by providing oxygen for respiration
, but by shielding organisms
from harmful UV rays i.e GREEN HOUSE EFFECT
and by incinerating small meteors before they hit the surface. Additionally, the composition and structure of this unique resource are important keys to understanding circulation in the atmosphere, biogeochemical
cycling of nutrients, short-term local weather patterns, and long-term global climate changes.