The pulp and paper industry is ranked the fourth-biggest contributor to global warming among manufacturing sectors in the United States. That’s not just because it destroys a large number of trees that would otherwise be capturing huge amounts of carbon. The whole cycle of felling trees, transporting them and using coal- and gas-fired processes to turn them into pulp is highly polluting. Marketplace’s European correspondent, Stephen Beard, has the story of the “deprinter” device that seeks to reduce the industry’s carbon emissions.