Atmosphere and winds are something without which we will not be able to live on earth. The gases in this layer protect us by blocking out dangerous rays from sun and making earth a perfect habitat for plants and animals. Let’s find out what are those gases which supports life on earth. The atmosphere consists of mixture of nitrogen (78%), oxygen (21%), and other gases (1%) that surrounds Earth.As you go beyond our planet, the atmosphere becomes thinner until it gradually reaches space. Atmosphere is divided into five layers and it has a great role for life on Earth . It not only provides the essential oxygen which is most important for life on earth, it also blocks some of the Sun’s dangerous rays from reaching Earth.