Chapter Questions
What biological event fostered the rapid growth of human populations? How did this event affect the location in which humans lived? What major cultural event eventually took place?
Why, in some respects, is the population size of the developed world more of a consideration in discussing resource use than the population of the nondeveloped world?
What three species supply more than half of the human energy requirements on earth? How many plants supply over $90 \% ?$
What problems must we master before nuclear power's full potential can be realized?
Why were chlorinated hydrocarbons banned in the United States? Why can you still find them as contaminants on fruits and vegetables?
How does acid precipitation form? Why has it been difficult to implement solutions to this problem?
What is the ozone layer? How is it formed? What are the harmful effects of decreasing the earth's ozone layer? What may be the primary cause of this damage?
What sort of action might you take that would make a significant contribution to solving the world's environmental problems?