Which of the following types of hazardous waste are unstable and pose dangers when in contact with other compounds?
A. reactive
B. toxic
C. ignitable
D. corrosive
Answer: A. reactive
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What does not affect surface currents?
a. Gravity b. Coriolis Effect c. Wind d. Density
Compare instrumental value and intrinsic value as they relate to determining the worth of natural species. Where does Leopold's idea of the land ethic fit into these two categories?
What will be an ideal response?
Of the main nutrients in the biosphere, the one that is fixed inside nodules in certain plant roots is ________
A) carbon B) nitrogen C) oxygen D) hydrogen E) calcium
We lose 5 to 7 million hectares of productive cropland per year to ________
A) soil conservation efforts B) forest replanting and regeneration C) recreational land use D) soil degradation E) abandonment, feralization, and other factors