Give your Christmas tree a second life, not in the dumpster.
Sweep up the needles and add them to your compost pile
Place the branches with needles on top of your flower beds. Even with snow on the ground. The needles will fall off and add organic matter to the soil. Don't worry about acidicity, as it will not be enough acid to change the pH
In the spring, chip the branches and use as mulch
Many communities pick up used trees for free. They often chip the trees into mulch.
You may find so many uses you might start collecting trees from your neighbors!