"The production of paper is both resource intensive and highly polluting. According to the U.S. Department of Energy, the pulp and paper industry is the third-largest industrial consumer of energy and the fourth-largest emitter of greenhouse gases among manufacturers. According to the U.S. Environmental Protection Agency, the industry is third among industrial sectors in the release of toxic chemicals to air and fourth in the release of toxic chemicals to water. In the United States, environmental regulations are fairly well enforced; such enforcement is not guaranteed in other countries, particularly developing countries, where more and more paper is being made. Most paper is not recycled and is instead thrown out, making up a third of the municipal waste stream. As the paper deteriorates in landfills, it releases methane, a greenhouse gas with 23 times the heat-trapping power of carbon dioxide. According to the U.S. EPA, municipal landfills are the largest source of human-related methane emissions, and a significant share of these emissions is generated by the decomposition of paper. Conscientious publishers will want to do all they can to minimize the harmful environmental effects of publication printing. Aside from simply printing less.which will happen as more publications go digital.publishers should do three things: Maximize recycled content; Maximize use of certified virgin fibers; Choose greener production." (p.1)