This report summarises the results of the project EnviSuM - an acronym for "Environmental Impact of Low Emission Shipping: Measurements and Modelling Strategies". In Chapter 1, the authors look at different emission abatement strategies including measurement results from different types of vessels. This section also presents results on the effects of switching fuels, the modelling used to measure ship emissions and compliance monitoring. In Chapter 2, they explore air quality based on emission results. Local air quality was modelled for three urban areas - Gothenburg, Gdansk/Gdynia and St. Petersburg. The effects of shipping emissions on public health and environment are assessed in Chapter 3. In Chapter 4 they discuss the economic consequences of SECA. This includes costs as well as positive effects of SECA, such as inducement to innovate and the enhanced reputation of the Baltic Sea region. The authors conclude in chapter 5 by looking to the future environmental shipping regulations. The report is backed up by a large number of international partner organisations from nine countries, namely the University of Turku (Finland), Chalmers University of Technology (Sweden), Maritime University of Szczecin (Poland), Finnish Meteorological Institute (Finland), Norwegian Meteorological Institute (Norway), University of Gothenburg (Sweden), Tallinn University of Technology (Estonia), City of Gothenburg (Sweden), Voeikov Main Geophysical Observatory (Russia), Maritime Development Center (Denmark), Baltic Marine Consult Ltd. (Germany), Baltic Marine Environment Protection Commission - Helsinki Commission (Finland), Helsinki Commission (Russia), International Institute for Applied Systems Analysis (Austria).