Contamination .7 (1993)

Walking through the woods, friends Matt (Jason Saucier) and Josie (Mary Sellers) come across a corpse. The woman clearly died an unnatural death, but the authorities can't determine exactly what killed her. The investigation soon centers on a local industrial plant that uses the woods as a trash heap for dangerous chemical waste. It becomes clear that the plant's practices have contaminated the trees, turning them into murderous organisms. A bit of logging might be in order.