unpolluted
adjective
un·pol·lut·ed
ˌən-pə-ˈlü-təd
: not contaminated or made unclean or impure : not polluted
a mind unpolluted by hatred
especially
: not contaminated with man-made waste
unpolluted water
… an unpolluted wilderness of startling size in this heavily populated state. —Nancy Piccin
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Merriam-Webster unabridged
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