1. Acid Rain Presentation.
If you were gone, watch it and copy the note in your notebook.

2. SCRUBBER Montana Coal Production Put day and Date Here Millions
of Tons
SCRUBBER

3. Look at the graph on the next slide
Look at the graph on the next slide. Write down 2 quality level-2 questions about the graph. You do not need to answer them. NOTE: Level-2 questions often begin with the word “why”.

4. (Biomass)

6. So far in this unit. . . No need to write this page down in your notes.
Structure and heating of atmosphere
Ozone depletion issue
Global warming/greenhouse issue
NEXT: Acid Rain

8. ACID RAIN

9. How acidic? Distilled water: 7.0 Rain water: 5.6 (Why?)
Write this down.
Distilled water: 7.0
Rain water: 5.6 (Why?)
Acid rain: as low as 4.2 (tea)

10. Problems caused by acid rain
Lakes become acidic (dissolved metals)
Tough on trees, animals, etc.
Eats away at statues

11. Causes of acid rain 1. Burning coal that contains sulfur
Write this down.
Causes of acid rain
1. Burning coal that contains sulfur
2. Nitrous oxides from trains, planes, autos

16. Near Colstrip

18. CO2
SO2
Mercury

19. How do we “generate” electricity? The Grid
No need to write this down.
How do we “generate” electricity?
The Grid

22. The recipe: SO2 + H2O > H2SO4
Write this down.
The recipe: SO2 + H2O > H2SO4
Sulfur dioxide
Cloud droplets
Sulfuric acid

23. A regional problem

25. Solutions . . . Clean Air Acts of 1970 & 1990
Write this down.
Burn “cleaner” coal
Install “scrubbers” to remove sulfur dioxide
Add “antacid” to lakes
SCRUBBER

28. August 2009: The Stacks Come Down.

29. FIGURE 16.C

30. The
END