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Geography Optional 300+ Score Pack · Model answer

What are the characteristics that make CHC a serious threat to the ecosystem ? Give examples.

  • UPSC 2013
  • Environmental Geography

Chlorinated hydrocarbons (CHCs), or organochlorines, are carbon compounds bearing chlorine atoms — mainly pesticides (DDT, BHC/HCH, aldrin, dieldrin, endrin, endosulfan), industrial chemicals (PCBs) and combustion by-products (dioxins, furans).

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What the full answer covers

  • Characteristics That Make CHCs a Threat
  • 1. Persistence
  • 2. Fat solubility and bioaccumulation
  • 3. Biomagnification
  • 4. Long-range transport
  • 5. Sub-lethal and endocrine effects
  • …and 4 more sections, with a conclusion

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