microplastics are divided into two main groups. Primary plastics are those intentionally manufactured to be of a particular size; while secondary plastics result from the breakdown of larger materials. Examples of primary microplastics include: pellets, powders, and industrial scrubbers. Additionally, plastics are divided according to their size into nano, micro and meso. The term nanoplastics refers to particles measuring between 1 and 100 nm, microplastics to particles of 0.1 µm (1000 nm) to 5000 µm, and mesoplastics to all materials above 5mm.