At Huddart State Park, the new trees will help reforest an empty glade that used to be a vollyball court.
"It's a service learning project which is something in 4-H that combines learning with community service," said one of the 4-H team leaders. Fiona Benjamin and Emma Filar are the teen leaders.
The teen leaders involved the Woodside High School Green Academy in the tree-planting event.
"It's good for the environment. It gives us more oxygen to breath," said Karen Estrada, a Green Academy member.
4-H Million Tree planting events have been organized all over the world, including Tanzania, Uganda and Kenya.
"One thing I've taken away from the project is that one person can make an amazing, tremendous difference by getting other people to go along with his or her idea," said the teen leader interviewed in the video.