The earth is the home of human beings and other living organisms. The life is possible due to the presence of favourable living conditions which make up our environment. Environment refers to everything that surrounds us ,the buildings, trees, animals, rivers, lakes, the whole nature. The environment also includes human made things like buildings, towers etc. The environment is classified into two types- natural and human made the natural environment includes trees, mountains, lakes, rivers, vegetation, animals etc. The human made environment includes transport, settlements, industries, building etc. Humans develop these things to live comfortably in their environment.