The term "plastics" refers to synthetic polymers that are ubiquitous in a modern society. Over the past few decades, the global production and consumption of plastics have been growing at an alarming rate. The growing trend in the use of plastics simultaneously increases the accumulation of ubiquitous waste plastics in landfills and in the environment, which represents a global aesthetic as well as ecological problem. For this reason different waste disposal procedures are implemented. In the hierarchy of different waste disposal procedures, there is recycling or waste recovery. The recovery of plastic waste can be mechanical, chemical and energetic, and resulting products can be reused for useful purposes. Such a way of disposing of waste plastics is currently the most cost-effective solution and it tries to avoid dumping waste in landfills, i.e., to reduce the amount of waste. Over the past two decades, the problem of waste has shifted increasingly from disposal methods to prevention and recycling. The member states of the European Union are committed to implementing and harmonizing current legal measures related to plastic items that are prescribed by European directives, and the ultimate goal is a circular economy model that will use plastics in a more sustainable way and reduce waste generation to a minimum.