'non-anthropogenic' is formed by the negative prefix 'non-' + 'anthropogenic' (from Greek roots) where 'non-' means 'not' and 'anthropogenic' means 'caused by humans'.

'anthropogenic' originates from Greek 'anthropos' (ἄνθρωπος, 'human') + '-genic' from Greek 'genēs'/'genesis' (γενής/γένεσις, 'producing, born of') via modern scientific coinage; adding the English prefix 'non-' produced 'non-anthropogenic' to indicate absence of human causation.

Initially, components referred to 'human' and 'producing/originating'; the combined modern term came to mean specifically 'not produced by human activity', particularly in scientific contexts such as ecology and climate science.