GRE Text Completion: JiJing 1373-GRE填空机经1373题 - 2HV3XTAF50WM7ELDA

Several studies (i)____________ the assumption that paper cups, because they were made of natural products, were more environmentally (ii)____________ than cups made of plastic (polystyrene). Indeed, these studies indicated that the environmental (iii)____________ of producing and recycling paper cups were similar to, if not more than, those related to the production, disposal, and recycling of polystyrene cups. A. corroborated B. friendly C. benefits D. exploited E. hazardous F. costs G. dispelled H. predictable I. opportunities