environmentalist
n. B2 Upper Intermediate US //ɪnˌvaɪɹənˈmɛnəɫɪst// UK //ɛnvˌaɪɹənmˈɛntəlˌɪst// en·vi·ron·men·tal·ist
n. a person who is very concerned about protecting the natural world and stopping pollution. They often work to make sure that nature is not harmed by human activities.
n. a person who advocates for the protection of the natural environment and the prevention of pollution. Often associated with political activism or scientific research regarding ecological sustainability.
The environmentalist spoke at the local town hall meeting.
As an environmentalist, she spends her weekends cleaning up the local beach to protect the marine life.
The environmentalist argued that the proposed highway would irreversibly damage the fragile wetlands, leading to a significant loss of biodiversity in the region.
From environmental + -ist.