Synopsis From the Preface: Ecology' and 'environment' are the terms of great relevance in the context of present day world. In fact, when man made and other natural calamities caused severe damage to world environment which resulted in extinction of many faunal and floral species on the earth, and even man's survival is at the stake, serious attention is being paid to protection of ecology and environment. Based on authoritative primary and secondary sources, this has become a dependable source of information to researchers, academics and professionals in the field.