Since 1900, and especially since 1950, the incidence of infectious diseases and the death rates from such disease has been greatly reduced
Recalling discussions from previous chapters, what other significant events have occurred since about 1950? Do you think these events are correlated? If so, what process is driving it?
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Since the early- to mid-1900s, the human population has exploded and the loss of wild species has declined rapidly. The increase in human population is the single most important factor in the elevated extinction rate of other species. Many countries are going through the typical phases of demographic transition, where death rates have been lowered (due to better health care, sanitation, etc.), but the birth rate has not yet been lowered. Eventually the birth rate will also decline as standard of living is raised, and the human population will stabilize.
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Almost all energy on Earth comes directly or indirectly from
A) Earth's interior. B) radioactivity. C) the Sun D) carbon dioxide in the atmosphere.
Discuss the change in the discipline of geography over the past 500 years in terms of the kinds of questions geographers ask
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Temperature inversions are rare in polar regions
Indicate whether the statement is true or false
vascular or nonvascular : angiosperm
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