Pepper spray is a great criminal deterrent. If you don't have any with you and you're concerned someone may try to break into your house, consider using wasp spray. Odds are that you have some in your garage. Let me be clear here, pepper spray is better. However, wasp spray can be effective if someone is breaking into your home.
Over the last 20 years, massive walls of green have been constructed across the Georgia landscape. These walls are not constructed of wood, steel or concrete. Rather, they are living walls "constructed" using the popular Leyland cypress tree.