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2 entries under ecosystem topic. ×

5
environment(nature, protection, ecology)
0
natural ecosystem(nature, ecology, world)
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APASmart Define. (1970). emission-free thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/emission-free/thesaurus/related
ChicagoSmart Define. 1970. "emission-free thesaurus" https://smartdefine.org/emission-free/thesaurus/related (accessed September 30, 2026).
HarvardSmart Define 1970, emission-free thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/emission-free/thesaurus/related>.
MLASmart Define. "emission-free thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/emission-free/thesaurus/related>