Is degradable the same as biodegradable?

There are currently three types of so-called environmentally friendly PLA stic bags: degradable PLA stic bags, biodegradable PLA stic bags, and compostable PLA stic bags. Everyone thinks that degradable means biodegradable, but it is not the case. Only when it can be decomposed into carbon dioxide and water can it have a protective effect on the environment.Degradable PLA stic bags: Polymers in PLA stic bags are partially or completely damaged due to ultraviolet radiation, oxidative corrosion, and biological corrosion, which means performance changes, fading, cracking, and fragmentation.Biodegradable PLA stic bags: the organic matter in PLA stic bags is completely or partially converted into water, carbon dioxide under the action of microorganisms/Biochemical processes of methane, energy and new biomass.Compostable PLA stic BagsCompostable PLA stic bags: PLA stic bags can be biodegraded under the special conditions of high-temperature soil, and usually require industrial composting to achieve better degradation. PLA stic bags are biodegradable or compostable, and are converted into water and carbon dioxide due to biodegradation, disappearing from the environment, achieving a true environmental protection effectPhotodegradation: PLA stics that are degraded by natural light can only be partially or completely damaged.Thermo-oxidative degradation: PLA stics degraded by heat or oxidation, which can only be partially or completely damaged by corrosion.When purchasing biodegradable or compostable PLA stic bags, you need to check whether the bags are issued with the national PLA stic bag logo, and judge the raw materials according to the logo. The commonly used biodegradable or compostable raw materials are PLA ,PBAT.Biodegradable bags under natural and soil or industrial composting conditions180The sky can be degraded into water and carbon dioxide, which belongs to the organic cycle and is harmless to the human body and the natural environment.