Pollutant Dispersal
Movement and spread of pollutants through air, water, and biological pathways from sources to receptors.
Real World
After the 2011 Fukushima nuclear disaster, caesium-137 dispersed across the Pacific via ocean currents, detectable on the US west coast by 2014 — demonstrating aquatic and atmospheric dispersal pathways simultaneously.
Exam Focus
For 'explain' questions on dispersal, always link source → pathway → receptor and name at least one physical factor (wind speed, inversion layer).
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