Discuss the adverse effects of toxic exposure. What do you think can be done to combat these effects?Discuss the levels of toxic dosage and risk factors associated with this in human and environmental exposure.How does Earth’s composition and radial structure provide clues to its origin?
Have you ever experienced a hair-raising flood, earthquake, volcanic eruption, landslide, or dangerous storm? If so, link that experience to something you’ve learned so far.
The deepest borehole penetrates only 12 km below the earth’s hard-rock surface. How do we know what’s down there below that? Be explicit with your examples.

  
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