MEWR, together with NEA, reviewed the recommendations of the Advisory Committee and the Sustainable Singapore Blueprint (SSB) commitments launched in 2009 to achieve an annual mean of 15µg/m3 of SO2 and 12µg/m3 of PM2.5 by 2020 and has worked with relevant government agencies and various stakeholders to arrive at a set of revised national air quality targets pegged to the WHO AQGs. The targets are in Annex I.