Most natural communities support a great variety of native plants and animals. Such biodiversity is threatened when a few plant species take over and dominate the herbaceous, shrub, and canopy layers of a forest. Learn how to identify and remove the exotic invaders threatening our native landscapes. You too can become a weed warrior and lead the charge to restore the local bio-habitats. With Patapsco Heritage Greenway, join John McCoy of the Columbia Association and Bob Marietta as they present the two-part Weed Warrior Group Leader certification class. Both parts are required for certification but do not have to be taken in order.