1. Pollution in Rivers Design by H Graham BSc PGCE

2. AIR Land flowing water River Bed

3. AIR Land flowing water River Bed

4. AIR Land flowing water River Bed

5. AIR Land flowing water River Bed Fertilizers into soil

6. AIR Land flowing water River Bed Fertilizers into soil Fertilizers leach into river

7. AIR Land flowing water River Bed Fertilizers into soil Fertilizers leach into river

8. AIR Land flowing water River Bed Fertilizers into soil Fertilizers leach into river

10. AIR Land flowing water River Bed River O 2 drops River flow rate slows Why do the fish start to die?