The environment is defined by the three constituents, which is the physical, social and biological systems surrounding man and other organisms along with various factors influencing them. And also the sum total of water, air and land and the interrelationships among themselves and also with human beings, other living organisms and property.
The physical constituent of environment includes soil, water, air, climate, temperature and light. These are called abiotic constituents of the environment. This part of the environment mainly determines the type of the habitat or living conditions of the human population. This physical constituent of the environment is again divided into three parts. These are the Atmosphere (gas), Hydrosphere (liquid), and Lithosphere (solid). These three parts represent the three important states of matter constituting the environment. The physical component of environment consists of non-living things like air, water and soil. All these non--living things have an affect all living organisms including man. Water and temperature are the most significant abiotic components affecting living beings.
The biological constituent of environment is called the biotic component of the environment. This component consists of all living things like plants, animals and small micro-organisms like bacteria. It interacts with the abiotic component of the environment. This interaction of abiotic and biotic components forms various ecosystems like pond ecosystem,