Global Plastic Waste Could Double by 2050

If current habits continue, global plastic waste is expected to double to over 120 million tonnes annually by 2050, according to a new study by Chinese and U.S. researchers.

However, experts believe that strong global policies could cut this alarming figure by 90%. Next week, representatives from 175 countries, including New Zealand, will gather in South Korea to discuss a United Nations treaty aimed at reducing plastic pollution.

New Zealand generates 3.6 million tonnes of waste each year, contributing 4.5% of the country’s greenhouse gas emissions. Among those advocating for change is Matt Peryman, a kaupapa Māori researcher and coordinator of the Tāngata Whenua Coalition for an Effective Plastics Treaty. He stressed the urgency of these talks, calling this a “pivotal moment in our history” to address not just visible plastic waste but also its hidden chemical impacts on human health and ecosystems.

Experts agree that recycling alone cannot solve the plastic problem. Sally Gaw, an environmental scientist at the University of Canterbury, highlighted the importance of reducing mismanaged waste, which would also help lower greenhouse gas emissions and limit the release of harmful chemicals.

Beach clean-up organiser Lorraine Shaab sees firsthand the growing issue. At Petone Beach in Wellington, the volume of collected rubbish has increased from just a few bags in 2017 to as many as 40 bags per cleanup in 2024. Common items include drink containers, fishing gear, and even disposable diapers.

The upcoming UN treaty negotiations represent a critical opportunity for countries to tackle the plastic crisis and reduce its impact on the planet. Without decisive action, the future may see even more plastic filling beaches, oceans, and landfills worldwide.