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Synopsis Recent developments in science have asserted the inter-dependence of all life, microbial, plant and animal, between themselves and with the physical environment of land, air, water and solar energy, this inter-dependence is embedded in the evolution of life during the past three billion years or more with the origin of various forms of life, and extinction of others, and the formation of our atmosphere, water bodies and land masses. The science of ecology is the study of such system, their inter-relationship and normal slow secular changes of such systems. The basic concepts of natural environment are x-rayed pros and cons in this book. The authentic information is organised in eight chapters namely—introduction; biodiversity; floral and faunal distribution; rivers; endangered resources; bio-resources; wildlife etc.