Soft plastics typically take centuries to decompose, but Hiro’s goal is to compress this into 12 months by embedding plastics with a proprietary blend of fungi that activates in response to the moisture from babies’ excretions. The fungi happily grow in oxygen-poor landfill conditions and secrete enzymes that rapidly digest the carbon backbone of plastics, leaving no microplastics behind, said Hiro’s founder and CEO, Miki Agrawal.