NASA Satellite Spots Toxic Air Pollution That Went Unreported

A new satellite-based detection method has revealed 39 unreported and major human-made sources of toxic air pollution. A known health hazard and contributor to acid rain, sulfur dioxide (SO2) emissions are closely monitored. Before this satellite-based analysis, SO2 monitoring methods had relied on known locations of pollution sources and subsequent use of emissions inventories from ground-based measurements.