Harvest Hills has U.S.A. developed a doggy waste bag that is bio-degradable, sustainable, made from corn and contains no microplastics. It takes about 118 days for these bags to break down in a landfill. For composting, it generally takes three to six months. The compost certifications are ASTM D6400 and EN 13432. Plus, it has the OK Compost Home certification and also for commercial and municipal compost. The bags degrade into water and CO2.