There is current concern that the amount of ozone in the stratosphere may be decreasing. Why is a decrease in ozone concentration significant? Describe some of the effects that a decrease in ozone concentration might have.
What will be an ideal response?
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China has more top 25 global world cities than all of Europe
Indicate whether this statement is true or false
Which of the following rock photographs depicts a felsic igneous rock?
A. 
B. 
C. 
D. 
"The Tragedy of the Commons" is based on the view that
A. Only privatization or strict laws can overcome people's selfish and greedy nature. B. Open access systems can be sustained and promoted. C. Communal systems can be sustained and promoted. D. Individuals will try to maximize gain for the group at a loss for the individual. E. Community members will attempt, without success, to sustain a resource for future generations.
Describe the four categories of natural, or biological, pest control. Cite examples of each and discuss their effectiveness
What will be an ideal response?