There are few holiday symbols more magical than a well-decorated and lit Christmas tree. While some people prefer the ease of an artificial Christmas tree, real trees continue to be a popular choice, with an estimated 25 million to 30 million real Christmas trees sold in the U.S. alone each year. Real Christmas trees provide the unmistakable pine smell that many people associate with the holidays, plus the feeling of having a true piece of the natural world inside the home.

So which is more sustainable, a real Christmas tree or an artificial one? Well, obviously you can use an artificial tree year after year. However, at the end of its lifespan, it will end up in a landfill. Artificial trees create high emissions during manufacturing and transportation and are generally made from a type of PVC that is nearly impossible to recycle.

Real trees, on the other hand, are produced on farms, and a new tree will usually be planted for every one that’s harvested. Farmed trees offer the same advantages as trees in the wild, such as cleaning the air and stabilizing soil.

More importantly, though, real Christmas trees can be recycled at the end of the season. That makes them the more sustainable choice in the long run.