Question

Air is an invisible mixture of gases made up of a mass of millions of tiny gas molecules that
moves randomly and at high speed. Without air the earth would be lifeless.
Composition of the Atmosphere
The atmosphere consists of a mixture of gases which are presentin varying proportions. Its
major constituents are nitrogen 78% and oxygen 21%. The rest of the gases 1% include
carbon dioxide, helium, ozone, argon and hydrogen. Impurities like dust, smoke, salts,
carbon monoxide and other chemicals are also present in the atmosphere. In it lower layer
the atmosphere contains water vapour too. Nitrogen is the largest conent and is
essential for survivaland growth of plants.
Oxygen is the second most plentiful gas. All living beings breathe in oxygen while the green
plants breathe out oxygen. Green plants use carbon dioxide present in the atmosphere to
make their food.
Thus, the plants help in maintaining a balance between oxygen and carbon dioxide
percentage in the atmosphere through the Process of Photosynthesis. If the plant cover is
reduced, it will affect the balance between oxygen and carbon dioxide levels in the
atmosphere.
carbon dioxide otherless
(0.00495)
oxygen​

Answer 1

Answer:

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