The dirty secret of alternative plastics

Read the full story at Time.

According to the United Nations Environment Program, nearly a garbage truck and a half’s worth of plastic ends up in rivers, lakes, and oceans every minute. Eventually those plastics break down into micro and nano plastic particles that poison our air, the water we drink, and our bloodstream. Approximately 40% of all plastic produced is designed for single-use purposes, and little of it is easily recycled. Like the PLU sticker, it is used just once and then thrown away. Yet the long-term consequences are enormous: The production of plastic, 98% of which is sourced from fossil fuels, is the cause of some 10% of all global greenhouse-gas emissions.

One proposed solution is to replace these plastics with alternatives: biodegradable utensils, compostable wrappers, plant-based bottles, and compressed-fiber plates and bowls. Theoretically, these products could seamlessly slot into existing supply chains, requiring no sacrifice on the part of consumers, who are clamoring for more sustainable options. But production is limited in scale, more expensive than conventional plastic, and it’s not yet clear that the alternatives are actually better for human and planetary health: most plant-based plastics are, on a molecular level, identical to their fossil-fuel-sourced siblings and last just as long in the environment. Other substitutes require many of the same toxic chemical additives as conventional plastics to keep them waterproof, flexible, durable, and colorfast.

Perhaps the biggest problem is that the infrastructure to ensure these bioplastics actually biodegrade or compost is very limited. That means that despite the best intentions of manufacturers and consumers, supposedly compostable plastic bags and supposedly biodegradable single-use cutlery may be causing just as much climate damage as conventional plastics. 

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