| 21. | Resources : Black earth, river water and a moderate climate.
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| 22. | What if the comet pieces that hit Jupiter had hit Earth?
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| 23. | -- Best game : Doom II : Hell on Earth.
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| 24. | Hockey would take a grave risk and be brought to earth,
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| 25. | Only three people were known to survive this hell on Earth.
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| 26. | The Earth's heat is, practically speaking, limitless.
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| 27. | He's just a down-to-earth person.
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| 28. | The bond should be strong enough to hold earth and plants.
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| 29. | And that pile of earth has plenty of rocks in it.
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| 30. | What is the future of the Earth's last continent?
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