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What is protocooperation? |
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What is ammensalim? |
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What is biodiversity? |
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What is the respective importance of water, carbon, and nitrogen for the living beings? |
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Into which type of energy is the light used in photosynthesis transformed. |
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What are the main chemical compounds that destroy the ozone layer? |
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Why is the sun the "motor" of the water cycle? |
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What is the group of aquatic beings composed of large number of photosynthetic beings? |
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Why waste is considered one of the major environmental issues? |
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What is the main biological process that consumes carbon dioxide? |
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What are the typical vegetation and the typical fauna of the tundras? |
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How does the vegetal stratification of an ecosystem influence the biological diversity? |
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What are the main limiting factors for the growth of a population? |
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What is harmonious ecological interaction? |
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What is plutonium reprocessing? Why is it a big environmental issue? |
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What are biotic factors? |
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What are the analyses provided by the study of human age pyramids? |
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What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution? |
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How is carbon dioxide made by producers and consumers? |
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What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution? |
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