Foreword
The World Congress held in Stockholm in 1972 provided the lead for concerted and organised efforts for the protection and preservation of environment. The message has since spread far and wide. and awareness exists today that industrialisation by itself is not to be viewed as a sign of development. Rather the qualitative improvement of life as a result of industrialisation needs to be taken as the index of advancement. All are indeed agreed that in the growth of mankind we have reached a stage where technology and industrialisation have a dominant role to play.

It is in this context that pollution caused by the industry has been viewed more and more seriously over the years. More recently the explicit and implicit dangers caused by the industrial effluents and pollutants have come to be critically examined and analysed with a view to minimising their hazardous effects. Justifiably therefore, emphasis is being laid on evolving the types of technologies which will form a better environment for all of us.
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