An Earthly plan for food waste

COMPOSTING CHAMPIONS: Frank Mastrobuono, left, and Mike Kowalczyk are the co-founders of Earthly, a Providence-based food-waste-management and composting company that recently took first place in the New England Cannabis Convention’s Pitch Slam. / PBN PHOTO/MICHAEL SALERNO
COMPOSTING CHAMPIONS: Frank Mastrobuono, left, and Mike Kowalczyk are the co-founders of Earthly, a Providence-based food-waste-management and composting company that recently took first place in the New England Cannabis Convention’s Pitch Slam. / PBN PHOTO/MICHAEL SALERNO
Frank Mastrobuono, a former environmental scientist, always considered himself the “outdoorsy type.” He used his “drive to go back to business school” to start a…

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