09 Natural world
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1. 10 Atmosphere alert
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2. 11 Smog
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3. 12 Atmosphere cleanup
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4. 13 Roasted planet
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5. 14 Vanishing mountains
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6. 15 Expanding deserts
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7. 16 Bring back the Earth
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8. 17 Target for 2000
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9. 18 Chainsaw massacre
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10. 19 Forests
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11. 20 Seeds of change
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12. 21 Plant trees
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13. 22 Sea of troubles
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14. 23 Mermaids
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15. 24 Life in the ocean
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16. 25 Take care
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17. 26 Rivers of shame
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18. 27 Some for all
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19. 28 Problem family
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20. 29 Good steward
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