Original sentence: As a result, it is estimated that life-years lost as a result of the chronic effects of ozone exposure will be about 2,300,000 lower in 2010 than in 1990, and there will be approximately 47,500 fewer premature deaths resulting from ozone and particulate matter in the air.As a result, the acidification of forests and lakes has halted in large parts of Europe.Progress towards reducing sulphur emissions was greater than the Protocol commitments due to a reduction in coal usage.reduce the number of days with excessive ozone levels by half
Edited sentence: As a result, it is estimated that human life-years lost as a result of the chronic effects of ozone exposure will be about 2,300,000 lower in 2010 than in 1990.As a result, the acidification of forests and lakes was halted in large parts of Europe.In addition, there will be approximately 47,500 fewer premature deaths resulting from ozone and particulate matter in the air.Progress towards reducing sulphur emissions was greater than the Protocol commitments due to a widespread European shift from coal to natural gas as an industrial fuel in the 1970s and 1980s.Since 2007 the UN ECE Working Group on Strategies and Review has been working to revise the Protocol and this work is expected to be completed by late 2010.reduce the number of days with excessive ozone levels by 50%