Quest Resource Holding Corporation, formerly Infinity Resources Holdings Corp., through its subsidiaries, provides management programs to reuse, recycle, and dispose of various waste streams and recyclables in the United States. The Company offers programs for recycling motor oil, oil filters, scrap tires, grease and cooking oil, expired food products, glass, cardboards, paper, metals, plastic oil bottles, hazardous materials, high density polyethylene (HDPE) plastics, organics, construction debris, batteries, mercury, lights, regulated medical waste, electronics, parts cleaners, used absorbents, and solid waste; industrial cleaning services; landfill diversion services; equipment and installation services; environmental certification services, and sustainability programs. The Company operates Earth911 Recycling Directory, a directory of information regarding recycling and proper disposal, and Earth911 Recycling Locator, which instructs consumers why, where, and how to recycle locally.