Natural environment means all living and non-living things occurring naturally, meaning not because of humans. The universe is natural, but often the term “natural environment” only means nature on Earth. Two aspects are usually included: Ecological units which are natural systems without much human interference.

An ecosystem (also called as environment) is a natural unit consisting of all plants, animals and micro-organisms (biotic factors) in an area functioning together with all of the non-living physical (abiotic) factors of the environment.

Biosphere illustration © Normaals

The environment is made up the biosphere which includes the interactions between the atmosphere, hydrosphere and lithosphere. It is often also divided into the micro environment and macro environment.