Questions about the danger of a particular chemical hazard will relate to that chemical's
A) toxicity, exposure, and dose.
B) exposure in the natural environment.
C) toxicity and abundance in the environment.
D) ability to dissolve in either water or oil.
Question 2
One of the greatest human impacts on natural ecosystems results from
A) the disruption of natural biogeochemical cycles.
B) the generation of electricity from nuclear energy.
C) the use of our oceans for shipping and transportation.
D) the use of the sun and wind to generate electricity.
