SSC Ecology And Environment Sample Paper NCERT Sample Paper-2

  • question_answer
    Which one of the following is an environment related disorder with the correct main cause?

    A)  Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.

    B)  Blue baby disease (methemoglobinemia) due to heavy use of nitrogenous fertilizers in the area.

    C)  Non-Hodgkin's Lymphoma found mainly in workers involved in manufacture of neem based pesticides.

    D)  Skin cancer mainly in people exposed to benzene and methane

    Correct Answer: B

    Solution :

    [b] It is widely believed to be caused by nitrate contamination in groundwater resulting in decreased oxygen carrying capacity of haemoglobin in babies leading to death. The groundwater can be contaminated by leaching of nitrate generated from fertilizer used in agricultural lands, waste dumps or pit latrines. However, the linkages between nitrates in drinking water and blue baby syndrome have been disputed in other studies.

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