ingested by ocean animals plastics release particles of toxic chemicals biodegradable polyethylene terephthalate (PET) plastic never decomposes 47 and 90 days to decompose plastics release particles of toxic chemicals Science.howstuffworks.com forever biodegradable photodegrades it doesn’t biodegrade, takes longer to break down in landfills biodegradable William Harris debunks this myth saying standard plastics don’t biodegrade they photodegrade 450 years plastics release particles of toxic chemicals Some materials biodegradable howstuffworks polyethylene terephthalate (PET) 47 and 90 days to decompose biodegradable plastik sulit diurai plastics release particles of toxic chemicals Some materials plastic doesn’t decompose plastic never fully biodegrades degrade available a very long time How long does it take for plastics to biodegrade? They take hundreds of years to break down DECOMPOSITION DECOMPOSITION plastic literally does not biodegrade DECOMPOSITION never going to disappear; DECOMPOSITION slowly break down into harmful toxins DECOMPOSITION thousands of years to degrade plastic will not decompose