The document provides an overview of the environment, including its biotic and abiotic factors, components, and domains. It defines the environment as the surrounding natural and human-made factors that affect living organisms, including air, water, food, and land. The environment has biotic living factors like plants and animals, and abiotic non-living factors like light, soil and nutrients. It is broadly classified into the natural environment of land, air, water and living things, and the human environment of built structures, communities and human impacts. The natural environment contains four domains - the lithosphere of rocks and soil, the hydrosphere of water bodies, the atmosphere of air, and the biosphere of all living things. E