A decrease in the levels of ozone in the ozone layer:
a. may be related to the human use of chlorofluorocarbons
b. is not a cause for concern to humans because the ozone layer is in the stratosphere
c. cannot be attributed to any human activities
d. has not been shown to be related to the incidence of skin cancers in humans
a
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In response to criticisms of Limits to Growth, a computer model was published in Beyond the Limits that
A. Includes a lower rate of world population growth B. Predicted a decrease in both population and resources in the next century C. Predicted an increase in resources in the next century D. Predicted growth in both population and resources in the next century E. Includes technological progress and pollution abatement
How do intertidal organisms separate themselves?
a. Zones based on the substrate brought in from the tides b. Zones based on the amount of submergence or emergence in water c. Zones based on the height of the tides d. Zones based on the amount of nutrients brought in from the tides.
The Holocene
A) saw a gradual warming trend at its beginning. B) saw only one period of cooling. C) saw sea levels rise during its early times. D) was a transfer from an interglacial period to a glacial period.
A nation with a low GNP might actually be wealthier than it appears because GNP does not take into account
A) corporate goods and services produced domestically. B) internal capital depreciation such as buildings and equipment. C) ecosystem services and goods created by families. D) bank assets, stocks, and bonds.