Q. Which two trawlers has been forced to switch to other commercially low types of fishes?

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Q. Why the seals were replaced by whalers?

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Q. What is the more water efficient way of irrigating crops?

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Q. What are the methods of irrigation?

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Q. Which mining affects the surrounding settlements by air, noise, and visual pollution?

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Q. What is mixed farming?

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Q. What is the major cause of income in developing countries?

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Q. Which fertilizer are expensive and bad to the environment?

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Q. Which mining causes breathing and chest problems?

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Q. Urbanization is the increase growth of

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Q. Which countries depends mostly on exporting minerals?

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Q. Which lung disease is caused to a miner by inhaling quartz is called?

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Q. The southern oceans hold on dissolved gases such as

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Q. Sustainable harvesting of wild plants and animals is known as

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Q. The southern oceans borders

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Q. Gene bank are vulnerable to disease,human error and

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Q. Why is soil red in color?

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Q. Population growth and technological pressure means ecology is under

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Q. The zooplanktons in the southern oceans are dominated by a 5cm long shrimps like

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Q. Which ocean has cold water and rich in life?

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