Stuck with a tree in your apt and don't know what to do with it? The Department of Sanitation will pick trees up at the curb Jan 4-15. Remove tinsel, ornaments, etc! If you have the means to drag your tree to Fort Greene Park this Saturday or Sunday, you can partake in Mulchfest, where trees are mulched and recycled in the park. If you have a yard yourself, you can take home a bag of fresh mulch! It's a nice way to contribute to our local park.
More info from 311 here.