Due to economy politics and consumer demand, waste has become a problem. The solution to this problem can be waste valorization. Giving waste a value, maintaining a hierarchy of waste management on all levels, recycling, reusing and processing as energetic use in a cement plant and not dumping waste in overloaded landfills is a way by which not only do we reduce the volume of waste, we also reduce usage of natural sources such as fossil fuels and raw materials. My Graduation thesis is based on how to co-process boards made from packaging waste at the end of their lifespan. Incineration of waste without adequate technology and strict supervision can be harmful to the environment because of air pollution. That is why it is regulated by various legislation acts. In The Republic of Slovenia the fundamental environmental law is Environmental protection act, followed by several different regulation acts. Within the borders of the European Union the most important act is The Industrial emission directive that contains best available techniques reference documents for each field of industry including waste incineration in a cement plant. To comply with the regulation Slovenia adopted a practice of issuing environmental permits. This restricts emissions, limits the waste volume for incineration and deals with the restrictions regarding waste composition in order to eliminate potential heavy metals, halogens and sulphur contents. The incineration of waste in a cement plant may at first seem harmful to the environment, however, the type of industry offers optimal circumstances for such waste treatment. The technology used is a more than fifty meters long rotary klin containing very high temperatures needed for raw materials to be transformed into a cement clinker which renders the technology more than sufficient for the process. This gives a very long retention time for flue gases to stay in high temperature for longer periods needed for burning out. They move in an opposite direction as raw materials entering the rotary klin. This heats up raw materials before entering the burning process. Consequently, this saves energy and also works like a natural filter in a preheating process. The basic nature of raw materials has the ability to absorb acid pollutants, for example sulphur and halogen elements. Before flue gases leave the chimney, they are treated in bag filters. This technique is currently listed as best available technique according to the European Union legislation. Energy consumption in cement plants to maintain high temperatures in rotary klin is enormous. Therefore, the usage of solid recovered fuels with its high calorific values as a secondary energy source contributes not only to the waste management field, but also to reducing fossil fuels overuse thus turning a cement plant operation more economical.