ecofreak

ec o freak |ˈekōˌfrēk, ˈēkō -ˈikoʊfrik | ▶noun informal a person who is unusually enthusiastic about the protection and preservation of the environment.

ecofreak

eco |freak |ˈiːkəʊfriːk | ▶noun informal a person who is very concerned about preserving the environment.