A plastic shopping bag buried in soil for three years could still hold a full load of groceries.

Biodegradable shopping bags buried for three years still work

Biodegradable shopping bags buried for three years still work. A new study casts doubt on the viability of biodegradable plastics as an answer to plastic pollution. Richard Thompson, a British marine biologist who devoted his career to studying plastic waste, has long wondered how well biodegradable shopping bags actually degrade. So in 2015, he and his graduate students at Plymouth University buried …