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Which of the following statements accurately describe the impact of mining discoveries on desert ecosystems?

  1. The discovery of gold in Australia led to the settlement of Karlgoorlie and Coolgardie in the late nineteenth century.
  2. Diamond and copper mining in the Kalahari desert has benefited its San inhabitants.
  3. The presence of valuable minerals in deserts has generally led to minimal ecological changes.

    AAll

    Biii only

    Cii only

    Di only

    Answer:

    D. i only

    Read Explanation:

    • The discovery of gold brought settlers to Karlgoorlie and Coolgardie, located on the edge of the Australian desert, in the late nineteenth century.

    • The presence of diamonds and copper has led to a rush of miners into the Kalahari desert (to the detriment of its San inhabitants).

    • The discovery of silver in Mexico, uranium in Utah in the USA, has changed the ecology and landscape of the desert.


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    Which among the following statements are correct?

    (i) Eco system restoration was the theme of World Environment Day of the year 2021.

    (ii) Pakistan served the global host for World Environment Day 2021

    (iii) Ecosystem restoration means a process of reversing the damage caused to the ecosystem and help in its recovery.

    Which of the following statements correctly identifies ways nutrients are lost from ecosystems?

    1. Nutrients can be lost from ecosystems through leaching.
    2. Wind and water erosion contribute to nutrient loss.
    3. Trace gas emission is not a known mechanism for nutrient loss.
    4. Harvesting materials from an ecosystem leads to nutrient removal.

      Which of the following are recognized ongoing functions occurring within ecosystems?

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        What are 'wadis' in the context of desert water sources?

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        2. A type of underground water storage system.
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        4. Areas with permanent vegetation due to underground water.