When pencil sharpings go bad and turn violent they can attck many things such as nerds (lloyd)
According to Webster's, a natural ecosystem is "the complex of a community and its environment functioning as an ecological unit in nature." More simply, it's both living and non-living things that...
A natural ecosystem is a biological environment that is found in nature (e.g. a forest) rather than created or altered by man (a farm).
Can be found in nature, without any human involvement.