Global bio-based plastics production capacity has more than doubled since 2010, although it only experienced a slight increase of 10 % during the past 5 years. Today, about 2.2 Mt or 0.5 % of plastics on the global market are bio-based, i.e., produced from a bio-based feedstock. The share of bio-based in total plastics production is only slightly increasing year by year (from 0.54 % in 2013 to 0.56 % in 2022). This is due to the fact that the production of fossil-based plastics is increasing as well. So, although the capacity for bioplastics production is rising, the share of biobased plastics of the total plastics production volume remains quite stable.
Bio-based plastics is a way to switch to alternative feedstocks, thereby reducing dependence of fossil fuels and GHG emissions. Bio-based plastics are produced from renewable biomass sources. The biomass mainly originates from plants such as sugarcane, cereal crops, oil crops or non-food sources like wood, organic waste and by-products, such as used cooking oil, bagasse and tall oil. The benefit of bio-based plastics is that they potentially have a lower climate impact (GHG emissions along the life span) than plastics made from fossil sources. This depends on the raw material and production process. They help reduce dependence on (foreign) fossil fuels. However, they may have higher environmental impacts (on land use, water use, biodiversity etc.)
Some bio-based plastics are chemically identical to fossil-based polymers, but just made from a different (bio-based) feedstock. These are referred to as drop-in bio-based plastics and include bio-PET and bio-PE. They can be collected and recycled together with their fossil-based counterparts. Other bio-based polymers such as PLA, PHA, starch blends are bio-based and biodegradable (EEA brief...). Biodegradable plastics are designed to decompose at the end of their life under suitable conditions. These are typically not compatible with waste management systems for conventional plastics, but instead need their own systems such as industrial composting facilities.