Edited because I cross posted. I agree with plantladlin
elizbe,
I'm almost afraid to tell you. If my eyes are seeing this correctly, it is a Chinese Tallow Tree/Triadica sebifera; extremely invasive. It will crowd out native species.
You have not yet filled in your information to show us where you live/location/climate zone., but wherever you live, this tree is bad news.
Not only will it create tons of viable seeds but the roots are powerfully strong and can travel long distances under concrete sidewalks and house slabs.
Some people who keep honeybees actually plant this tree because they care more about making honey than they do about the environment.
Please be responsible and destroy it.
