Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 

Compost - a hidden source of plastic pollution

Compost - a hidden source of plastic pollution.

The extensive use of all kinds of plastic in food production is a ticking time bomb because of the risks it poses to the environment and human health, says ESR Environmental Scientist Olga Pantos.

Dr Pantos says there is a growing public awareness of the risks posed by plastic in the marine environment but there is not the same level of knowledge about the risks plastics pose in the soil.

One potentially hidden source of plastic moving into the environment is via compost.

Dr Pantos says that even consumers who want to do the right thing with their plastic waste get confused about what they can recycle and what should go to waste.
Labelling is often hard to read and often even harder to understand. She says increased use of biopolymers and plastic alternatives in food packaging makes it likely that the amount of plastic in green waste is increasing.

While some consumers might think they are making good decisions by choosing compostable and biodegradable labelled products, they can be just as harmful to the environment as conventional plastic if they are not disposed of properly.

Putting these products into compost may mean they are simply degrading to smaller pieces of plastic and making their way into the food chain.

A recent study in Germany found compost from supermarket waste had close to 900 pieces of microplastic in a one-kilogram sample.

Once that plastic gets into the compost it can have an impact on the biological function of the soil. Dr Pantos says the nature of plastics makes them effective in absorbing chemical contaminants, making them more toxic.

She says consumers are starting to become aware of the hidden plastic content in apparently harmless items like tea bags but she says there is still a lot to learn about how to make good choices as a consumer.

She says that per capita New Zealanders generate some of the highest amounts of plastic waste in the world.

Globally over 311 million tonnes of plastic was produced and most of that is single-use.

Olga Pantos is a senior scientist at ESR Food, water and Biowaste group – based in Christchurch.

She was involved in the recent survey of marine microplastics in Wellington.

© Scoop Media

 
 
 
Business Headlines | Sci-Tech Headlines

 

New Strategy: Fletcher Building Refreshes Board Chair And Directors

Fletcher Building's outgoing chair Ralph Norris announced the board's audit and risk committee chair Bruce Hassall will succeed him when he steps down from the troubled building company in September. More>>

ALSO:

Treasury Speech To Accountants: Human Capital And The Living Standards Framework

Our ambition is to integrate a broader conception of economics and value into the everyday work of public policy. We are taking this forward by developing what we call our Living Standards Framework. More>>

ALSO:

Up 0.5%: GDP Growth Eases Slightly

Gross domestic product (GDP) rose 0.5 percent in the March 2018 quarter, Stats NZ said today. This followed a 0.6 percent increase in the December 2017 quarter. Growth in service industries more than offset a fall in construction activity. More>>

ALSO:

Baby Formula: Fonterra Satisfied With Beingmate's Response To Error

Fonterra Cooperative Group is satisfied Beingmate Baby & Child Food is taking the right steps to deal with a labelling issue after getting caught out in a widespread audit by Chinese regulatory authorities. More>>

ALSO: