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Card 26
Front
Why do these percentages change very little?
Back
Card 27
Front
Why has the amount ofncarbon dioxide in the air increased over time?
Back
Card 28
Front
What formed the original atmophere?
Back
Card 29
Front
How did the oxygen reach its current levels?
Back
Card 30
Front
What is the process called degassing?
Back
Card 31
Front
Nameand explain one theory about the original atmosphere
Back
Card 32
Front
Why is it important to control atmospheric pollution?
Back
Card 33
Front
Why is sulfur dioxide dangerous?
Back
Card 34
Front
What does a catylic converter do?
Back
Card 35
Front
What chemicals react in a catylic converter?
Back
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