Can microorganisms break down plastics?

 

Dear EarthTalk: Is it true we needn’t worry about plastic pollution because nature will evolve microorganisms to break it all down? — C. Davis, Sacramento, Calif.

Humans have long aimed to maximize efficiency and convenience in everyday life. Plastic has fueled the growth of today’s post-industrial world: From food preservation and textile production to construction and machinery, plastic has made elements of everyday life more convenient. Consequently, the planet is inundated with plastics like Polyethylene terephthalate (PET). Around the world over 70 million tons of PET plastic is manufactured, and only 19% of it is recycled. The World Economic Forum estimates the planet is on track to have as much plastic by weight as fish in the ocean by 2050. Scientists and environmental advocates are keen to solve global plastic pollution.

In 2016 Japanese scientists at the Kyoto Institute of Tokyo took samples outside of a recycling facility in Osaka and made a revolutionary discovery: microorganisms capable of breaking down PET plastic. They use enzymes that allow degradation of plastics into component pieces in only six weeks, compared to the 450 years it takes for plastic to break down on its own.

This discovery questioned how people can harness and utilize these microorganisms, as the naturally-occurring microorganisms broke down plastic at a rate far too slow to be efficient for practical use. In response, scientists created a “super enzyme” — a mutant of the naturally-occurring organisms — capable of speeding the rate of plastic degradation so that 90% of a sample can be broken down in 10 hours.

Plastic-eating microorganisms are an amazing example of the resilience and adaptability of our planet. However, they are unlikely to be our saving grace to rid the Earth of the plastic pollution scourge.

EarthTalk® is produced by Roddy Scheer & Doug Moss for EarthTalk at www.emagazine.com; send questions to question@earthtalk.org.

Latest News

Planning Board hears Cumberland Farms wastewater treatment plan

Cumberland Farms gas station on Route 343 in downtown Amenia.

Photo by Nathan Miller

AMENIA — Expanding the capacity for wastewater handling at the Cumberland Farms site along Route 343, the Planning Board at its regular meeting on Wednesday, Feb. 12, discussed the plans and referred the project on to Dutchess County officials for decision.

Representing Cumberland Farms was Caryn Mlodzianowski, project engineer for Bohler Engineering of Albany, specialists in engineering challenging sites.

Keep ReadingShow less
North East talks fire aid, taxes, cell towers and more at board meeting

MILLERTON — The Town of North East held a board meeting on Thursday, Feb. 13, to create a “memorandum of understanding” contract between the Village of Millerton and the town, explaining how the town will assist the village after its Highway and Water Department building caught fire on Feb. 3.

“The resolution authorizes the town superintendent of highways to assist the Village of Millerton and its highway department with plowing, repair and maintenance of the village highways,” supervisor Chris Kennan said. “Pursuant to provisions of section 142e of the Highway Law, during the period of the Village’s state of emergency.”

Keep ReadingShow less
Village board weighs impact of garage fire; discusses sidewalk work

Village of Millerton offices on Route 22

John Coston

MILLERTON — On Monday, Feb. 10, a board meeting was held, largely centered on the impact of the Feb. 3 fire that destroyed the Village Water and Highway building located on Route 22. In addition to the loss of the building, vehicles, equipment and tools were also destroyed.

“If we go back to the cause, it is still undetermined,” said mayor Jenn Najdek, who stated foul play had been ruled out. She also confirmed the garage remained off-limits as the investigation is still ongoing.

Keep ReadingShow less
The Journal seeks young reporters for summer internship

The Lakeville Journal and Millerton News are seeking young journalists for an educational internship program.

The six week program provides training in the everyday operations of a community weekly. Interns will learn the news-gatheringprocess from pitch to print through regular workshops with industry professionals on topics such as photography, libel and copy-editing.

Keep ReadingShow less