Food, Drinking Water and Fresh Air
Chapter-1 Introduction 1.1Overview To have life on the earth food, drinking water and fresh air are the basic requirement. Without these life is not possible. The way population is increasing, demand of these basics also increasing. Every country has to find the new sources of these 3 basic requirements otherwise it is difficult to cope up with the demand. Dependability on natural sources is not enough for this purpose. In this new era, technological changes have changed the world scenario. […]