Sudarshan Nityananda gives the following contact numbers:
South Bangalore comes under Mr Ranganathswamy,DCF-BBMP.His number is 9480683842.
His senior is Mr N D Sudarshan who sits in the BBMp premises.His number is 9480684566.
The third person is Sathyanarayana who sits in Utility Bldg,MG Road.His number is 9480683146.
Please contact any of these people if you find trees being cut down in Bangalore.