The greatest challenge to world food supply has been
A) drought.
B) global warming.
C) military conflict.
D) food prices.
E) limited labor.
Answer: D
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At which of the following wavelengths does the Earth emit radiation of greatest intensity?
A. visible wavelengths B. ultraviolet wavelengths C. radio wavelengths D. infrared wavelengths
Lightning, thunder, hail, and occasionally tornadoes are associated with which cloud type?
A. nimbostratus B. cirrostratus C. cumulonimbus D. cumulus E. altocirrus
Now the world's second largest economy, behind only the United States, China accounts for a third of total world economic growth, and GNI per capita has risen faster there than in any other country
Indicate whether the statement is true or false.
What is the Enhanced Fujita scale? Into what category do most tornadoes fall?
What will be an ideal response?