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Supply chain activities have major impacts on the environment. Consuming natural resources leads to environmental pressures, simultaneously, releases of various pollutants have exerted serious environmental defects. Therefore, a set of rules, laws and standards is developed for supply chains in local, national and international levels in order to protect the environment. These environmental legislations have created new challenges for management of supply chains. A part of this broad subject is potential application of operational research techniques in effective environmental decision-making. The present paper reveals different applications of operational research in environmental management. Some examples of macro and micro environmental problems are mentioned in which operational research methods could be employed. Waste management, recycling management and prevention management are examples of micro environmental problems and in the macro level, local, regional and