Where can I download eco friendly font from?

I am looking for eco friendly fonts as I have to prepare a report on ‘Green Movement.’ I thought it would be nice if I use eco friendly fonts for my report. But I don’t know from where to get these eco friendly fonts? Could someone tell me the name of some websites from where I can download this eco friendly font? Also tell me how to use downloaded eco friendly font on Ms Word? I would really appreciate your information pertaining to this. Thanks.