environmentalist
US /ɪnˌvaɪ.rəˈmen.t̬əl.ɪst/
UK /ɪnˌvaɪ.rəˈmen.t̬əl.ɪst/

1.
环保主义者, 环境学家
a person who is concerned with or advocates for the protection of the natural environment.
:
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She became an environmentalist after witnessing the effects of pollution.
在目睹了污染的影响后,她成为了一名环保主义者。
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Many environmentalists are concerned about climate change.
许多环保主义者都关注气候变化。