plastics

Friday June 7, 2019

Editorial Cartoon by Graeme MacKay, The Hamilton Spectator – Friday June 7, 2019

Study sheds light on human consumption of microplastics

A study from the University of Victoria has for the first time compiled research on microplastics to try to estimate just how much people are consuming.

June 1, 2019

Microplastics are pieces of plastic that are just under five millimetres in diameter — or smaller than the size of a sesame seed — that come from the degradation of larger plastic products or the shedding of particles from water bottles, plastic packaging and synthetic clothes.

Garth Covernton, a PhD candidate at University of Victoria’s department of biology, said his team looked at 26 papers assessing the amount of microplastics found in individual food items.

May 2, 2018

The study found that a person’s average microplastic consumption — based on those food items previously analyzed — would likely be somewhere between 70,000 and 121,000 particles per year. While younger girls were at the lower end of the spectrum, adult men were at the high end.

People who consume a lot of bottled water could see that number jump by up to 100,000 particles per year.

The study analyzed the amount of microplastics found in fish, shellfish, sugars, salts, alcohol, water and air, which account for 15 per cent of Americans’ caloric intake.

But the other 85 per cent of what people consume, like beef, poultry, dairy and grains, has still not been examined.

March 6, 2015

Covernton compared the study to early understandings of cigarettes and tobacco: While the numbers they came up with did seem large, they don’t yet know exactly what level of consumption is dangerous.

“We’re at the point where we know microplastics at some dose could be harmful, but we’re not at the point where we can say whether what the average person is encountering is the equivalent of one cigarette in a lifetime, or that chronic exposure, like a pack a day.”

Covernton said the findings demonstrate more work needs to be done to understand how the tiny particles might affect human health. (CBC) 

 

Tuesday April 24, 2018

 

Editorial Cartoon by Graeme MacKay, The Hamilton Spectator – Tuesday April 24, 2018

‘We need to rethink the entire plastics industry’: Why banning plastic straws isn’t enough

Britain announced this week that it plans to ban the sale of single-use plastic straws, as support for similar bans grows in Canada and around the world.

March 6, 2015

Advocates say such straw bans should help reduce plastic pollution that harms wildlife and ecosystems, but we need to monitor the effects of such policies. And they say bans may not be feasible for most of the plastics in our lives, so broader changes to the way we produce, consume and dispose of plastics are needed to make a real difference.

Jennifer Provencher, a postdoctoral researcher at Acadia University who studies the ingestion of plastic pollution by wildlife, said Britain’s ban is “an incredibly important step towards minimizing and using plastics more responsibly.”

She noted that single-use plastic items like straws and stir sticks are generally used only for a few minutes before they’re discarded, but can persist in the environment for centuries because plastics don’t typically decompose within a human lifetime.

Scientists estimate we’ve made 8.3 billion tonnes of plastic since the 1950s and 6.3 billion tonnes have already become waste.

More than 330,000 pieces of plastic and foam waste were picked off 2,800 kilometres of Canada’s shoreline by volunteers during beach cleanup events last year, including 17,654 straws — the ninth most common item found during cleanups supported by Ocean Wise and WWF-Canada. Worldwide, 409,087 straws and stirrers were picked up in beach cleanups around the world in 2017, the Ocean Conservancy reports.

Because of their small size, disposable straws are rarely recycled and often end up in the environment.

There, they can cause serious injuries to animals, as shown in a 2015 video that shows a straw being pulled out of a sea turtle’s nostril — the graphic, viral video has been viewed more than 21 million times. (Source: CBC)