A shrewd entrepreneur joins the 100+ accelerator program sponsored by brewing giant AB Inbev and home consumables emporium Unilever, and spots a pattern. The breweries have tons of spent grain, and the home consumables have a plastics problem. Build a bridge between the two problems, and you have Mi Terro, a company that takes agricultural waste and processes it into proteins that can be used as a plastic replacement, animal feed and much more. The company just raised $1.5 million to start scaling up production.