Sylvia Harris and Sam Simelane performing  safety checks at the Sasol Oil petrol blending plant at Secunda. Ø sasol oil highlights Environmental  annual review 2010 • operating reviews •  sasol oil 39 In 2010, the refining of crude oil at our Natref refinery, as well as the storage, handling and transport of liquid fuels resulted in the  direct emission of 0,9 Mt of the greenhouse gas, carbon dioxide. Total water use in 2010 was 1,8 million cubic metres (Mm$^{3}$). o Improved safety record o Increased sales volumes and margins boosted profi tability o Reduced costs substantially o  Significant improvement in Natref performance in second half of the year o Governance matters and competition law compliance well managed  Operational % change 2010 2009 Total sales Mt (5) 43,7 46,1 Total production Mt (9) 39,1 42,8 Recordable case rate* RCR (52) 0,53 1,11  Financial % change 2010 2009 Operating profi t/(loss) Rm 489 1 364 (351) Operating margin % 400 3 (1) Contribution to group  operating profi t % 700 6 (1)