Water Polution

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Across
  1. 2. Pollution that crosses the boundary of another country or ocean
  2. 5. When aerobic species have died off and anaerobic thrive creating toxins
  3. 7. Pollution so small it floats on the surface
  4. 8. When bacteria and viruses make their way into a water source and causing disease
Down
  1. 1. Pollution to above ground water sources
  2. 3. When water based ecosystems are thrown off balance from things like fertilizer
  3. 4. When toxins like fertilizer seep into the ground to contaminate water sources
  4. 6. When chemicals make their way into underground and surface water sources