Why seaweed is a natural fit for replacing certain plastics

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Why seaweed is a natural fit for replacing certain plastics
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Five out of eight finalists for a million-dollar sustainability prize floated algae as an alternative for plastic film.

So, it calls for a equally gigantic solution. Just this week American fashion company Tom Ford announced the finalists for its $1.2 million. Out of 64 applicants spanning six continents, eight were selected to material test their concepts for plastic alternatives. After a year, three winners will be chosen to share the prize and continue to develop their product, says Dune Ives, executive director of the environmental nonprofit Lonely Whale, which is co-leading the competition.

The journey from a slimy green plant to plastic-like material can be a stretch for the imagination. But it’s a shockingly simple concept, explains Mike Allen, lead scientist at, a marine bioscience group based in the UK, and associate professor of single cell genomics at University of Exeter. Plastic manufacturing requires stringing “basic building blocks” of chemistry into different polymers. Those building blocks, Allen says, can come from most anything.

All five algae-based finalists in the competition are designed to decompose and biodegrade. Notpla, for example, breaks down in home compost in about 10 days. Meanwhile, Zerocircle’s founder and director Neha Jain says its alternative can break down in marine environments in a matter of hours, depending on the temperature of the water. Seaweed is also incredibly bountiful, appearing pretty much anywhere there’s a beach .

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