OZONE DEPLETING SUBSTANCES MTR has an ongoing programme to phase out its use of Ozone Depleting Substances (ODS). 100% of chillers in MTR-managed properties and an estimated 50% of operational railway chillers now contain zero refrigerants containing Chlorofluorocarbons (CFCs). The remaining chillers will be modified by 2015, with all new chillers complying with ODS legislation.	Environment Introduction Environmental Management Environmental Performance Progress Against 2002 Targets Environment Targets for 2003 Green House Gas Emissions Waste Noise Local Air Quality Water Consumption Indoor Air Quality Dust Ozone Depleting Substances Discharges to Water Environment Targets 2002 : Summary of Incomplete Targets