890: Bioplastics | Skeptical Sunday

Defining Bioplastics

Jordan Harbinger and Michael Regilio explore the world of bioplastics, starting with a clear definition. Bioplastics are derived from plants like potatoes, cassava, and sugar cane, unlike traditional plastics made from petroleum. There are two main types: PLA, which is technically edible, and PHA, made by microorganisms and not edible 1. Despite their potential, bioplastics are costly, sometimes 20% to 50% more expensive than petroleum-based plastics 1. Jordan and Michael also discuss the historical context, noting that bioplastics date back to the 1860s with the development of celluloid 1.

   

Environmental Impact

The environmental impact of bioplastics is complex. While they are plant-based, their production involves pollutants from fertilizers and pesticides, and they contribute to ozone depletion 2. Additionally, bioplastic production requires valuable farmland that could be used for food crops 2. On the positive side, algae-based bioplastics offer a promising alternative, utilizing excessive algal blooms to create durable products like packaging materials 3. Jordan highlights the need for a shift in how we use plastics, emphasizing that the problem lies not just in the material but in our consumption habits 3.