If you've ever wondered where petroleum comes from in the first place, how plastics could ever be made to biodegrade, and how science might be answering the call for better sustainability practices in the future, this is the episode you've been waiting for. Dr. Stephen Mayfield of UC San Diego, and his team, have developed algae-based flip flops which are not only coming to market next spring, but are harbingers of wonderful, much-needed change to come. 

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