My little one acre pales compared to the land areas others have spoken of, but it's representative: I have a hard time keeping up with the English ivy, burning bush, porcelain berry, garlic mustard, oriental bittersweet, liriope, Norway maples, Callery pears, and more that the birds, winds, and water plant on my land. I have suffered Lyme disease after too close contact with barberry in the wild (read the research out of Connecticut about the barberry/tick/Lyme disease connection). I  have spent years volunteering on national and county park and nature preserve land, removing invasive exotic plants. I have also sat in lengthy meetings of the Invasive Species Advisory Committee, learning over and over that the palnts that cause the biggest problems in Northern Virginia where I live may not be the ones of greatest concern in other parts of the state, but that if a plant is a problem in one part of Virginia now, it will likely become a problem in more places next year. Let's get serious about addressing this problem.