1930- 21stcentury americanessays biodiversity biodiversityconservation congresses culturalpluralism discourseanalysis education effectofhumanbeingson englishlanguage etc ethnoscience gary globalization glossaries humanecologyandthehumanities inupiat languageandculture languageandlanguages languageattrition languagesincontact nature philosophyofnature poetry snyder socialaspects vocabularies