I learned that bioplastics are often just as harmful to the environment as traditional plastics. It takes tremendous amounts of land and water to grow the plants used to make bioplastics, as well as pesticides and fertilizers that are detrimental to nearby aquatic habitats because of the biomagnification and algal blooms they contribute to, respectively. To add to this, bioplastics would reduce the amount of crops available as food since making bioplastics would require materials from the same agricultural sources as produce. Given this, the reduced carbon emissions created from using bioplastics instead of regular plastics are negligible when it comes to the other side effects of this industry.
I was surprised that spoons and cups that have the label "compostable" on them are actually not compostable in most cases. For starters, most compost sites are unable to accept them because they are often confused with regular, non-compostable plastics. Moreover, industrial composting sites, which do have the capacity to compost such plastics, are difficult to come by. As a result, "compostable" bioplastics tend to end up in the same place as regular plastics: the landfill. I had the unfortunate misconception that if a compostable item goes to a landfill, it would compost just as it would in a compost bin, when in reality, those materials are packed so tightly that only anaerobic respiration by bacteria is possible. Unless the landfill has a methane cap to harness the methane produced from this process, this contributes to incredible amounts of greenhouse gas emissions.
BPI certified compostable items are accepted by my city's waste management site, but rather than rely on this, I will continue finding ways to reduce my plastic use, whether that be of traditional plastics or bioplastics.