A centralized emission management system is implemented via a server that is accessible to a large number of entities. The entities upload information relevant to determining a measure of environmental impact. The server calculates benchmarks for a performance metric based on the entities' measures of environmental impact and certain normalization factors. Based on a comparison of the performance metric of an entity against one or more benchmarks, the server may transmit initiatives to the entity for reducing environmental impact and an alert to related subordinate entities to reduce their environmental impact.