Covered in baubles, they are the ultimate symbol of Christmas. But what happens when the party's over?
In Cumbria in the UK, old Christmas trees are being put to good use.
Once drilled into the river banks, these branches help to reduce the force of the water.
It prevents erosion and reduces the risk of flooding. And so recycling means Christmas trees are not just for Christmas.
put to good use 很好地利用