Yara International ASA said it has strengthened its position in emissions control for ships, industrial plants and heavy-duty vehicles with its acquisition of H+H Umwelt-und-Industrietechnik GmbH, which produces Selective Catalytic Reduction (SCR) systems for secondary NOx (nitrogen oxide, nitrogen dioxide) reduction in marine and stationary land engines. Increasingly stringent environmental regulations, including in the U.S. and Europe are imposing tougher NOx reduction standards on cruise ship…