On Tuesday, Sept. 19, at 1pm, the Leland Township Public Library will host Heather Smith, waterkeeper at the Watershed Center Grand Traverse Bay, for a program called “Microplastics in the Great Lakes.” Plastic is the most prevalent type of marine debris found in our oceans and Great Lakes. Plastic debris can come in all shapes and sizes, but those that are less than five millimeters in length (or about the size of a sesame seed) are called “microplastics.”