| Properties | Biopolymer | Petro-based plastics | 
      
        | Renewability | Yes or partially | No | 
      
        | Sustainability | Yes | No | 
      
        | Degradability | Biodegradable and/or
          compostable | Usually non-degradable
          (Some are degradable through
          polymer oxidation) | 
      
        | Polymer    range | Biopolymers    (lipids, proteins,
          Starch    etc.), Bacterial polymers
          (Polyhydroxyalkanoates,
          polyhydroxybutyrate) | Extensive | 
      
        | Green    house gas emissions | Low emission | High emission | 
      
        | Utilization    of fossil fuels | Limited    utilization | High    utilization | 
      
        | Agriculture    land utilization | Expected to increase | No utilization |