Because the raw materials needed to manufacture plastic grocery bags are 40% less than paper bags, a pound of plastic production requires 91% less energy than 1 pound of paper production, compared with plastic, paper bag manufacturing and use of more than 70% of the gas emissions. From a practical point of view, the production of plastic raw materials are mainly oil, while the production of paper products raw materials are mainly trees or grass, and paper bags and can not be reused, feel more wasteful with paper bags.