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Waste is still a problem in certain areas. It is necessary to innovate the use of waste into a useful material, one of which is an energy source. This paper aims to describe the physical concepts that exist in the processing waste into an energy source. The method used is descriptive. This research shows that there are several physics concepts that play a role in the processing of waste into energy sources: force, pressure, fluid, energy, thermodynamics, electricity and others. This study concluded that the waste treatment process contains many physical concepts that can be packaged in the form of physics enrichment materials. The development of physics enrichment materials is expected to improve student literacy and awareness of waste and the physical concepts contained in it.