"Compostable ... symbol along with the letters "PLA" underneath, which stand for Polylactic Acid -- a plastic derived from plant material rather than synthetic materials that are not biodegradable ...

And Graham Rihn, founder and CEO of the waste management platform RoadRunner Recycling, said it was important to draw a distinction between biodegradable bag liners and compostable liners ...

Compostable plastic products contain a certification label from the U.S. Composting Council, typically the number "7" inside a recycling symbol along ... that are not biodegradable and over ...