Our planet is surrounded by an invisible shield called the atmosphere.

(NASA Photo)

AIR

IS A MIXTURE OF GAS AND STEAM MAKING UP THE ATMOSPHERE

(the graphic symbol that identified the air source wikipedia)

ELEMENTS

THIS GAS MIXTURE, IS MAINLY COMPOSED OF

DIFFERENT ELEMENTS, SUCH AS:

CONDITIONS

THE PRINCIPLE FACTORS THAT IDENTIFY THE CHARACTERISTICS AND PROPERTIES OF THE AIR, IS DICTATED BY THE INDIVIDUAL VARIABLES, SUCH AS:

TEMPERATURE

UMIDITY

SPEED

DENSITY

QUALITY

ALTERATION

THE CONDITIONS OF QUALITY AND ALTERATION, OF EXISTING ONES DEFINED IMPORTANT, ARE THOSE PARTICULAR AFFECT TO LIFE AND HEALT CONDITIONS OF THE LIVING.