History of Science and Engineering Annotation << Back On the History of Ecological Research of the City of St. Petersburg and its Environs E.P. Yanin In early 1890-es V.V. Dokuchaev worked out a project of investigating environment and municipal economy of Saint-Petersburg and its suburbs based on the original program of complex investigations of a big city environment and factors responsible for its changes. The present article deals with these little-known facts of scientific and practical activities of this outstanding scientist. Key words: environment; soil science; geophysics; geochemistry.