However, improvements in genetic and metabolic engineering have produced strains of microbes and plants that could significantly improve yields and production capabilities, while reducing costs product totals. These factors, when added to rising oil prices and growing environmental awareness, could expand the market for bio-based plastics in the future. Process Bio-based natural polymers These types of polymers are prepared by living things, essentially in the same way they were once used. Some examples are; • Polysaccharides •