The present disclosure provides a system comprising a plurality of autonomous units within a geographical region, each configured with a sensor array and a cognitive emission and air pollutant mapping module that enables them to map their surrounding environment and sense and overlay pollutant and emissions data onto said map, including cameras and object detection algorithms for tracking and photographing pollutant sources. Each unit securely transmits the fused map and pollutant source data to one or more servers that compile a complete 3D map of the geographical area overlaid with pollution data which is updated in real time, and also notify relevant third parties to action pollutant sources within the area. The system can further comprise a plurality of smart light poles for displaying pollution data and advisory notices to citizens within sub-regions of the area.