Industrial agriculture, monocultures and genetic engineering are not limited to crops. Forest tree species are already grown in large scale plantations by lumber and paper producers, and are increasingly being considered as feedstock for biofuel production. Now, industry is genetically engineering these same trees to grow faster, tolerate colder climates, and produce wood that breaks down more easily for processing. However, trees are complex organisms that play a central role in native ecosystems’ health and vitality, and comprehensive risk assessments are needed to understand possible impacts of genetically engineering trees. The potential environmental risks are significant, far-reaching and irreparable.