MENTION FOUR WAYS TO SHOW THAT AIR IS HELPFUL TO US
Four uses of air are as follows:
- Air contains life-sustaining gases such as oxygen and carbon dioxide. Oxygen is essential for respiration and carbon dioxide is essential for photosynthesis.
- Nitrogen present in the air is fixed by microorganisms into nitrates. These nitrates are used by plants to form proteins. These proteins are finally consumed by animals too.
- Rapidly moving air, called wind helps in the movement of windmills generating electricity.
- Wind causes the movement of clouds and help in rainfall.