Craig E. Ten Brink, a Glen Rock, N.J., native, and the base threatened and endangered species program manager, discusses the negative impact humans can have on the environment during a training seminar with 2nd Marine Logistics Group aboard Camp Lejeune, N.C., Dec. 5, 2012. Ten Brink cautioned the Marines to dispose of waste the proper way and to watch out for fellow servicemembers' recycling habits.