You don't litter them in the first place
rivers, lakes or they would fill a bowl up with water from a lake or river!
Governments use rivers to clean it by putting the water into the "Water Treatment Plant." After they clean the water they put in your house to drink.
Rivers can and do dry up.
some reasons is they help clean the air, they fight global warming ,and it clean our rivers and streams. Sorry but that is all I got. If I learn more I will post it up. I hope you like it.
Only in some rivers.
We can control pollution being dumped into the rivers, regularly remove trash, and quickly address toxic spills to keep them clean. Rivers will naturally repair themselves but this process can take many generations or longer depending on the severity of the problems.
cause if there aren't any rivers or clean water were they live, they have to make one to survive
rerouted two rivers
Probably, although much has been done in recent years to clean up the Thames.
Rivers can but aren't limited to lead up to... oceans, lakes, ponds, or other rivers.
wetlands
used it for fishing,to make drums[they stick it inside of the drum]swim in, to clean there selves,and to clean dishes,cook with,drink it