Page 30 - ICSE Science 3 : E-book

Deep Breathing

Deep breathing is a simple method of breathing in a lot of oxygen-rich air. It is a
type of pranayama and is practised during yoga or meditation to relax our body
and mind. It involves deep inhalation and holding the breath for a few seconds

before exhalation.

Simple process of deep breathing

• Sit in a comfortable position keeping your back
straight in a quiet place. Close your eyes.

• Take a deep breath slowly through your nose.
This will make your stomach swell and expand

a little.
• Now hold your breath for a few seconds and
slowly breathe out through your mouth. You

will notice that your stomach goes in when you Deep breathing
breathe out.

• Repeat this process several times until you feel your body and mind relax.

Deep breathing exercises result in better supply of air into the lungs. They can be
done several times in a day for a few minutes. This improves our overall health.

Air Pollution

Pollution means the addition of harmful substances to the environment that
makes it dirty and unsafe for humans, plants and animals. The harmful substances
that make environment dirty are called pollutants. The addition of harmful

substances such as smoke and gases to the air as a result of human activities is
called air pollution. It makes the air impure and unsafe for breathing. The presence

of these harmful substances in the air can aff ect the health of all living things.

burning of wood smoke from vehicles smoke from factories
Air pollution

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