Natural Resources – Notes
The region where the atmosphere, hydrosphere and lithosphere interact and supports life is called biosphere.
Air is mixture of gases like nitrogen, oxygen, carbon dioxide and water vapour.
Water exists as seas and oceans on the Earth’s surface and as water vapour in the atmosphere.
Soil is a mixture of small rock particles, minerals and decayed organic matter called humus.
Contamination of the air, water and soil with toxic substances leads to pollution.