Greenhouse Gas Emission Reduction
A Responsible Commitment to Sustainable Development
Consumption of energy and carbon emissions is interlinked. Any effort to reduce energy consumption has a significant impact on reduction of GHG emissions. Tata Steel’s efforts towards GHG reduction and addressing climate change include;

• Fuel substitution in boilers (coal to by- product gas), a CDM project

• Modernization/automation of the steel plant

• Recovery and reuse of by-product energy

• Increased green foliage

• Reduction in refrigerant consumption by using R134 & vapour absorption technology

• Use of low NOx burners

• Proposed installations of Coke Dry Quenching and Top Recovery Turbine (CDM Projects)

• Use of steel slag in cement manufacture

Ozone-Depleting Substances (EN9)
The Steel Works used 5.747 tonnes of refrigerant during the reporting period (05-06) compared to 7.426 tonnes of refrigerant used during previous year (04-05). The organization has replaced R11 & R12 by R134 and vapour absorption systems.

Indirect GHG emissions (EN30)
The indirect GHG emissions are emitted from sources like the refrigerators and air conditioners supplied by the organization or owned by the employees at their residences, GHG emission on account of purchase of oxygen, etc. It is practically impossible for a large entity like Tata Steel to compile data for such emissions.

Hazardous Waste under the Basel Convention (EN31)
The Company does not import or export any waste deemed “hazardous” under the terms of the Basel Convention Annexure-I, II, III & VIII. All hazardous waste generated is handled as per the requirement of Hazardous Waste Management & Handling Rules 1989/2000. All hazardous waste is appropriately recycled and or disposed off as detailed in Waste Handling (EN 11).

Water discharges, runoff and the receiving eco-systems (EN32)
The Company discharges it’s treated effluent from the Works and treated domestic sewage from the township of Jamshedpur to the rivers Subarnarekha and Kharkai as well as other surface water sources. Studies carried out by NEERI in the year 1993 & 2000 at Jamshedpur to assess impact on eco-systems/habitats of rivers found no significant impact on the aquatic eco-system as given in EN20. Noamundi & Joda Mines, West Bokaro, Jharia Collieries, Sukinda Mines have achieved zero discharge. The domestic effluent is discharged through the septic tank – soaking pit route at the mines and collieries. Sewage Treatment Plants have been provided for the entire township of Jamshedpur.

Emissions (EN10)
Emission through process stacks
Tata Steel has undertaken several initiatives, which have resulted in a considerable reduction in stack emission as seen in the Figure 5.16. Indian standards (norms) for SO2, NOx, & PM for stacks in steel plants are furnished in Table 5.12 along with actual values monitored during the reporting period.