Most of the weather of the world is based upon changes in the moisture, pressure or temperature of the troposphere.
The layer closest to the surface of the Earth is troposphere. This layer goes up to twenty kilometers above the Earth. The troposphere is very essential as it contains the weather of the Earth and also greenhouse gases to maintain the temperature on Earth.
Troposphere layer has the air humans breathe and the clouds in the sky. The air is densest in this lowest layer and the troposphere has three-quarters of the mass of the entire atmosphere. The air in troposphere is 78% nitrogen and 21% oxygen.
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