hearing loss (NIHL), with 28 reported  cases. This compares with 13 cases in  2009 and 18 in 2008, and represents 52%  of total illness cases reported in 2010.  Some 18 cases (33% of total) were  lung ailments, such as asbestosis,  mesothelioma and pneumoconiosis,  but excluding tuberculosis (TB).  Seven TB cases (12%) are, by and large,  not work-related, but are reportable to  authorities in the case of mineworkers.  By its nature, the coal gasifi cation process  on which Sasol’s success has been built is  a significant contributor of greenhouse  gases. We recognise that without  achieving substantial reductions in  greenhouse emissions, our coal-to-liquids  (CTL) technology is unlikely to be socially,  financially or environmentally acceptable  in the medium to long term. The challenge  of balancing immediate energy security  needs with the desire to move to a  low-carbon future is profound. We are  committed to using our proven skills –  particularly in technology innovation  and commercialisation – to contribute  to finding solutions to this challenge. During the year, specifi c governance  structures have been developed or  revised to address the greenhouse gas  challenges facing the group. A greenhouse  gas management committee meets  regularly to discuss strategic issues and  take decisions on behalf of the group.  A carbon credit management committee  functions as a sub-committee of the  greenhouse gas management committee  and governs the group carbon portfolio.  A climate change task team has recently  been constituted by the group executive  committee to assess, evaluate and  make recommendations on pressing  matters related to climate change. We have committed to reducing the  greenhouse gas (GHG) emissions intensity  of all our operations by 15% by 2020  on a 2005 baseline, and to reducing our  absolute GHG emissions by 20% for all  new CTL plants commissioned before  2020, and by 30% for plants  commissioned before 2030 (with the  average 2005 CTL design as the baseline).  Our absolute emissions of greenhouse  gases globally (measured in CO$_{2}$  equivalent), have increased from  71,5 million tons (Mt) in 2009 to 75,0 Mt  in 2010, mainly due to the inclusion of  Oryx GTL emissions data. This fi gure  includes the direct emissions associated  with our processes (Scope 1 emissions),  the indirect emissions associated with our  electricity usage (Scope 2), as well as the  emissions associated with the  transportation of goods and services at  most of our operations (partial Scope 3).  For joint-venture projects over which we  have operational control, we have  included 100% of the GHG emissions,  even though we may only have part  ownership of the joint venture. Our direct  and indirect emissions levels have been  independently verified by an external  assurance provider. Our emissions intensity for 2010  (measured as carbon dioxide equivalent  per ton of production) was 3,05; this  compares with 3,24 in 2009 and 3,02  in 2008. The improvement in our GHG  intensity is primarily due to the inclusion  of our Oryx GTL operation, which has a  lower carbon intensity. We anticipate  further emissions-intensity improvements  following the commissioning of the  Secunda gas turbine project in June 2010. Ensuring access to a reliable supply of  water, and minimising our impacts on  water resources, is a critical strategic  priority for Sasol. We operate facilities  and are planning projects in countries  such as South Africa, Qatar, China, India  and Uzbekistan, where there are various  site-specific challenges relating to the  supply, quality and reliability of water  resources. Water management has thus  been identified as a material issue  in Sasol’s governance matrix, and a  dedicated sustainable water function  has been established within Sasol New  Energy to respond to these challenges. Our total water demand for 2010 was  151,3 million cubic metres (Mm$^{3}$). This  compares with an annual water demand  of 152 Mm$^{3}$ in 2009 and 154 Mm$^{3}$  in 2008. Our total volume of water  Addressing the issue of water security annual review 2010 • operating reviews  •  sasol group services •  safety, health and environment continued 79 Responding to the climate  change challenge SD Our separate sustainable  development report includes further  information on our climate change  mitigation activities, along with a  comprehensive review of the potential  risks and opportunities that climate  change presents for our business,  and a benchmark of our performance  against that of our peers. detailed review of our water  management performance and  activities is provided in our online  sustainable development report,  against each of the six areas identifi ed  by the UN Global Compact CEO  Water Mandate. 