| #2 |  Emeraldalicious
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| #3 |  The Berenstain Bears Go Green
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| #4 |  Riley Mack stirs up more trouble
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| #5 |  Coral Reefs
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| #6 |  Never say die
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| #7 |  Little Sweet Potato
|
| #8 |  Polar Bear, Why Is Your World Melting?
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| #9 |  The reasons for seasons
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| #10 |  This Is the Earth
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| #11 |  Sunshine Makes the Seasons
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| #12 |  Earthquakes Earthquakes
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| #13 |  A tree is a plant
|
