When you drive into my home state of Maine two of the first signs you’ll notice are a sign to watch for moose and a sign banning the importation of firewood. The reason for the moose crossing sign is fairly self-explanatory. The reason for the ban on importing firewood may not be so obvious. Importing firewood is banned because we are trying to prevent the introduction of invasive insects. The part of the explanation of why we’re concerned about invasive insects can be found in a TED-Ed lesson titled
The Threat of Invasive Species.

The Threat of Invasive Species is a TED-Ed lesson that explains the problems caused when plants and animals are introduced to non-native habitats. The lesson explains how plants and animals get introduced to new environments, what happens when they are introduced to those environments, and what some governments do to try to control invasive species.