| From the data, you can tell that: |
pH improves as you go up the river DO improves as you go up the river Alk. is good all along the river Number and variety of critters increases as you go up river Variety of plants increases as you go up river |
1) All indicators improve as you go up the river.
2) As the water goes down and gets closer to the sea, more and more things are polluting it.