Biology is a very popular subject among the students. Many students take a keen interest in Biology as it ii considered as a foundation stone in a Medical Career. Study of Plants, Animals, Dissection of Animals, Study of Tissue, Life Cycles and Classification of Plants and Animals all one important for students. This Encyclopaedia The Encyclopaedia of Environmental Science, Technology and Engineering incorporates concepts in Environmental science as well as protective measures t0ouirrorc Deterioration of Environment Technically. The present work has been compiled to include valuable and succinct material on environmental technology'' This encyclopaedia contains terms covering vast range of subjects like The Air Above 0cean, The Upper Atmosphere, The Sun and the Earth, The Weather instruments, Sounding the Troposphere Depths, Violence of Air, Helios Rampant, Weather Measurements, Composition of Atmosphere'' Thunderstorms and Line Aqualls, Earth''s Highest Frontier, Atmospheric Electricity, Atmospheric0ptics, Population Resource and Environment, Climate Present and Past, The Physical World'' The global problem of Environmental Degradation would throw our very existence in peril, unless proper and timely remedial action is initiated in right earnest. Now the time has come t0 plan for the sustainable development in harmony with the environment. This encyclopaedia will prove to be useful and informative for students, research environmentalists, engineers and teachers in the field of environmental science. This encyclopaedia is also useful for the general reader as well.