An ecosystem is a group of animals and plants living in a specific region
and interacting with one another and with their physical environment.
Ecosystems include physical and chemical components,such as soils,water and nutrients
that support the organisms living there.These organisms may range from large animals to
microscopic bacteria;for instance,one species may serve as food for another.
People are part of the ecosystems where they live and work.
Human activates can harm or destroy local ecosystems unless actions
such as land development for housing or business are carefully planned to conserve
and sustain the ecology of the area.