This reduction can be explained by an increase of plastic and paper concentrations.
In the previous decade (1985–1995) papers accounted for no more than 20% and plastics for less than 10%. In contrast, recent studies (1995-current) suggest that papers now comprise 25% and plastics percentage doubled reaching 20%. This represents an increase of 25% for paper and 100% for plastics, or 60% in total. In the most recent studies (Salonica 1998, Pylaia 1998 and Cretan Region 2003–2004), there is also an increase in packaging materials. This change is not only a result
of the prevailing consumption patterns, but also an outcome of modern practices for marketing of products and goods.