TATA CONSULTANCY SERVICES :

There are several green practices employed across TCS facilities. These include opportunities for

(i) energy savings(for example, energy efficient LED lighting, sensor based light turn on/off, building design for cooling efficiency,automatic cooling system modulation based on need and load, alternate energy for lighting and cooking),

(ii)reducing water consumption (for example, recycling, rain water harvesting) and ground water recharging,

(iii) waste reduction (for example, paper reduction, composting and digesters for bio waste) and

(iv) fuel and emissions reduction through cycling, car-pooling and buses.

At TCS, they have made significant strides across all these fronts, leading to 12.5% reduction in electricity consumption, 76 MWH of solar energy generation, 1.5M cubic metre of water reuse, 28% and 67% reduction in paper and printer cartridge consumption, leading to a 2% reduction in the carbon footprint in FY 07-08 compared to the prior year. This has been achieved through corporate level policies, raising awareness of the employees, setting targets and achieving them systematically, and obtaining ISO 14001 [2]certification for 22 of our delivery centers and LEED [3] green building certification for 3 locations.
http://www.tcs.com/about/corp_responsibility/green_proc_pol/Pages/default.aspx