Skill Check 2You have measured the concentration of mercury in sea water and organisms in a saltwater bay and recorded the results that are shown below. The concentration is measured in parts per million (ppm). You know that a mercury level of 0.2 ppm in the human body causes mercury poisoning, which can lead to kidney damage and eventual death.
How many times more concentrated is the mercury in the fish than in the sea water? Are the fish safe to eat?
| Element | Mercury Level |
|---|---|
| Sea water | 0.00004 ppm |
| Algae | 0.05 ppm |
| Fish | 0.4 ppm |
| Water birds | 2.8 ppm |