Why do people pollute rivers?
answer : )

Because they are inconsiderate and don't really care about animals and or plant't or anything that lives in rivers they think about themselves but mostly people don't think about things before they do them they just act they don't really think they are hurting anything but they're hurting gods creation that's why people pollute.

Hey there  jaylajakara15p8gvfy! question:   approximately what per cent of russia is used for permanent cropland? answer: b) 10%hope this ! -jayden

Sonar is an application of the doppler effect used by submarines.  this test was on k12.