What is the meaning of public sector industries?what are the public sector industries in karnataka?

this info is for an assignment........i need an industry where i can get info on the raw materials used,the infrastructure that they have,the waste produced and how this waste is disposed
please help
THANK U in advance
:-)
Update: is B.H.E.L.,B.E.L. a public sector industry?
2 answers 2