encyclopaedia(A comprehensive, often multivolume, reference work containing articles on a wide rage of subjects or on various aspects of a particular field, usually, alphabetically arranged)
end-of-pipe technology(An approach to pollution control which concentrates upon effluent treatment or filtration prior to discharge into the environment, as opposed to making changes in the process giving rise to the wastes)
endangered animal species(Animals, birds, fish or other living organisms threatened with extinction by natural or human-induced changes in their environment)