polyethylene (PE) - a family of resins obtained by polymerising ethylene gas
• Polietylen

polyethylene terephthalate (PET) - lightweight thermoplastic that is clear, resistant to chemicals and moisture with low permeability to gases
• Poliester etylenowy

polystyrene (PS) - type of plastic derived from petroleum product styrene
• Polistyren

polyvinyl chloride (PVC) - PVC is a thermoplastic polymer ( i.e. it can be softened and shaped by heating, and then hardened by cooling, without any chemical change)
• Polichlorek winylu (PCW)

ponding - the filling up of the void spaces in a biological filter, or in a landfill site where liquids are co-disposed in the deposited refuse and further throughput is not possible due to an accumulation of solids
• Zatkanie

pores - small void spaces in rocks or aggregates
• Pory

pore blinding - the blocking by small particles of the interstices or pores in porous rocks
• Zatkanie porów

porous - containing holes or voids
• Porowaty

porosity - the ratio of the space occupied by voids or pores to the total volume of the material containing them
• Porowatość

precipitate - the solid separated from solution by chemical...