Sentence:  "People ask me if am I a <WSD>greenie</WSD> and I go, ‘No, not in the sense that I chain myself to trees, no I′m not. But in the sense that I am concerned about the environment and do my little bit to help, then yes I am.''' 
Meaning of the word marked with <WSD> tags:  An environmentalist; someone who shows concern for the environment.