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UPSC Prelims 2022Question 49Environment

“Biorock technology” is talked about in which one of the following situations ?

Options

  1. (a)Restoration of damaged coral reefs
  2. (b)Development of building materials using plant residues
  3. (c)Identification of areas for exploration/extraction of shale gas
  4. (d)Providing salt licks for wild animals in forests/protected areas

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