environmentalism

en·vi·ron·men·tal·ist

[en-vahy-ruhn-men-tl-ist, -vahy-ern-]
noun
1.
an expert on environmental problems.
2.
any person who advocates or works to protect the air, water, animals, plants, and other natural resources from pollution or its effects.
3.
a person who believes that differences between individuals or groups, especially in moral and intellectual attributes, are predominantly determined by environmental factors, as surroundings, upbringing, or experience ( opposed to hereditarian ).

Origin:
1915–20; environmental + -ist

en·vi·ron·men·tal·ism, noun
an·ti·en·vi·ron·men·tal·ist, noun, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
environmentalism (ɪnˌvaɪrənˈmɛntəˌlɪzəm) [Click for IPA pronunciation guide]
 
n
psychol Compare hereditarianism the belief that a person's behaviour is affected chiefly by his environment

00:10
Environmentalism is always a great word to know.
So is interrobang. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
environmentalist (ɪnˌvaɪrənˈmɛntəlɪst) [Click for IPA pronunciation guide]
 
n
1.  an adherent of environmentalism
2.  a person who is concerned with the maintenance of ecological balance and the conservation of the environment
3.  a person concerned with issues that affect the environment, such as pollution

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

environmentalism
1923, as a psychological theory (in the nature vs. nurture debate), from environmental + -ism. The ecological sense is from 1972. Related: Environmentalist (1916 in the psychological sense).
Online Etymology Dictionary, © 2010 Douglas Harper
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