From YETI:
YETI invites you to turn your holiday habit into an underwater habitat, by donating YOUR Holiday Tree(s) to help better fish ecosystems!
Local parks and wildlife departments can sink your old Christmas tree in river, reservoirs, and waterway systems as part of revegetation projects to create immediate, new habitats for the fish, and this year, YETI is connecting its fans with these departments to maximize the number of trees being sunk. The sunken brush-like fir or pine trees offer smaller fish species a place to hide, attracting larger gamefish. And these benefits can start being seen in as little as 10-15 minutes! You can learn more about the initiative and how to get involved HERE.