I am environmental engineer, expertising in the design of pollution control devices for air and water pollution problems for industries as well as domestic issues. I retired as a professor and head of chemical engineering department , IIT Delhi. I have nearly 30 years of experience in the field of environmental engineering. During this period I worked extensively in more than 100 industrial projects in india and overseas. I was associated with many goverment committeesof MOEF, DPCC, FICCI, PHDCCI and others.