The Oxo-Degradable additive breaks down the long hydro-carbon bonds of the plastic reducing the film strength and eventually providing a nutrient source for microbes. These microbes eat the broken down molecules reducing what was once plastic to water carbon dioxide and reusable biomass. This process requires oxygen and can occur at the top layers of a landfill or in the presence of sunlight heat or stress. Depending on conditions, this process can take between 2 months and 5 years. 100% degradable. Meets ASTM D6954-04 for degradable plastic. High density. Meets source reduction guidelines.