 Plastic waste has become one of the most pressing environmental issues of our time due to its abundance and difficulty of disposal. This paper examined the potential use of plastic waste as a fuel source, focusing on two types of plastics, plastic waste and lignite. Plastic waste had a significantly higher energy content than lignite, while having a lower ash content and producing less ash. Additionally, plastic waste had a lower maximum potential emission of CO2 compared to lignite. Furthermore, the ash produced from plastic waste was of similar quality to lignite, although it had a slightly higher risk of slagging. Overall, plastic waste appears to be a promising alternative fuel source, particularly when combined with lignite. This article was authored by Agape Vasiliadu and Costas Tsaiopsias.