Biology 5090 · O Level · Effects of humans on ecosystems

Effects of humans on ecosystems — practice question

Untreated sewage has nitrates and phosphates in it. What happens in the lake if untreated sewage is discharged into it?

  • Aincreased biodiversity
  • Bincreased eutrophication
  • Cincreased fish populations
  • Dincreased light penetration

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