Can you imagine life without non living things (like air, water, sunlight, soil)? Living things cannot exits without non living things. An ecosystem is the study of interactions between living (biotic components) and non-living things (abiotic components) that forms a stable system.
Biotic factors such as consumers (carnivores, herbivores) and decomposers dependent on producers for food to form a food chain.
Loss of energy occurs from one trophic level to another, this is termed as 10% law of transfer of energy.
Lot of chemical fertilisers are used to obtain high yield, which enters plant body. The animal which depends more on plants accumulate more chemicals. This process is called biomagnification.
A large number of environmental problems arise due to the non biodegradable wastes generated by humans such as CFCs, plastic, detergent, dyes which get into soil and water bodies and harm the organisms living there.