To pour out
These not only pollute the land but the run-off causes water pollution as well.
Nine-tenths of the rainfall is absorbed by the loess and sandy soils, with only one-tenth being "run-off."
The zippers are waterproof and both the neck and sleeves have water run-off features.
I never would have believed he would run off and leave us like that.
Nonpoint source pollution or run-off pollution includes apparently minor household contaminants such as lawn chemicals or car cleaning fluids.