As water drains off and eventually combines at a central point in a watershed, it picks up different types of surface pollution left over from agricultural, industrial, commercial, and other types of human activity.
where is the final resting point for all of the pollutants?

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

i need an image of the diagram