The greenest of all, when it comes to Christmas trees, just may be 85 year old Jean Eadie of Scotland who has been using the same tree since 1928! This certainly takes the concept of reusable to a new level. In Jean's words, "Everybody buys things and chucks them away, which they shouldn't do."
Read more about Jean and her Christmas tree in Treehugger.
Graphic courtesy of http://dedo.delaware.gov/business/reuse/index.shtml.