en·vi·ron·men·tal·ism
/ənˌvīrə(n)ˈmen(t)lˌizəm,ənˌvī(ə)rnˈmen(t)lˌizəm,enˌvīrə(n)ˈmen(t)lˌizəm,enˌvī(ə)rnˈmen(t)lˌizəm/
noun
noun: environmentalism
1.
concern about and action aimed at protecting the environment.
"he claims to embrace modern environmentalism and an ecological approach"
2.
the theory that environment, as opposed to heredity, has the primary influence on the development of a person or group.