Environmental Studies(ES)

ENVIRONMENTAL STUDIES

Lesson 30: Human population and environment

Introduction

Living organisms and their non-living systems of the environment are inseparably interrelated and interact upon each other. Organisms live within a relatively narrow sphere over the earth’s surface: it is less than 20 km thick, extending about 8 km above sea level and 10 km below it. This thin film of land, water and soil over the earth’s surface is called Biosphere. It consists of three non-living components i.e. the land (lithosphere), the water (hydrosphere) and the air (atmosphere). Biosphere, lithosphere, hydrosphere and atmosphere are also called as environmental segments.

• Lithosphere
• Hydrosphere
• Atmosphere