Answer: To lower the possibility of bringing in insects from other places.
Step-by-step explanation:
Insects and other pests and pathogens can be transported in firewood. It is therefore imperative that people do not bring firewood from place to place because those insects could be transported to other areas where they will become invasive species and cause damage to that area.
This is why the DNR instituted rules on the transportation of firewood from one place to another such as all the bark being removed or the firewood being USDA Compliant.