Biodegradable plastics exist because traditional ones take between 20 and 1,000 years to break down in the wild, often blocking waterways and killing animals as that all happens. That’s why two industrial designers and a group of microbiologists have designed a way to break down plastic — and create edible mushrooms in the process. To be precise, the team created something called the Fungi Mutarium: a glass dome that houses hollow egg-like pods containing bits of plastic in their cavities.