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Name one crop that has absorbed insecticides

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Surface Waters and Underground Seas" & 5. "Realms of the Soil"

  • In describing what happened at Clear Lake, California in the 1950s, Carson notes that "The maximum concentration [of DDD] applied to the water [to destroy the gnat population] was 1/50 part per million.  How could the chemical have built up to such prodigious levels [as 1600 ppm] in the grebes?"  What is the answer to this question?  Include reference to DDD concentrations in plankton, herbivorous fishes, and carnivorous fishes.
  • Name three beneficial species living in soil.
  • Name one crop that has absorbed insecticides from contaminated soil, leading to a decrease in agricultural output  and/or posing a health risk.

Reference no: EM132450236

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