The problem of microplastic pollution is now the order of the day in front of everyone’s eyes affecting the
environment and the health of leaving creature. This work aims to retrace the history of microplastics in a critical
way through a substantial bibliographic collection, defining the points still unresolved and those that can be
resolved. Presence of marine litter in different environments is reviewed on a global scale, focusing in particular
on micro and macro plastics definition, classification and characterization techniques.
