Ecotourism throughout the world relies upon
A) the harvesting and sale of natural products.
B) the human desire to collect wildlife and wildlife products from around the world.
C) a widespread public interest in exploring and maintaining natural environments.
D) an interest in discovering plants to create new crops and agricultural products.
C
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It has been suggested that the threat of global warming can be addressed by geoengineering strategies. Which strategy has not been examined by researchers?
A. adding iron to the oceans B. building lots of chemical plants to remove ocean acidity C. injecting sulfate particulates into the stratosphere D. covering the oceans with Styrofoam chips E. placing giant mirrors in orbit above the earth to reflect sunlight
Perhaps in no other country is the memory of war etched so vividly in the national consciousness as it is in Russia
Indicate whether the statement is true or false
Radio telescopes are generally much larger in size than are optical telescopes
Indicate whether the statement is true or false
Examine Figure 3.11. Assume that the flow shown is measured at a place on the Colorado River before it reaches southern Arizona (where most of the water withdrawals take place). What caused the low flows from 1965-1980?
A. lack of rain and snow upstream B. completion of Glen Canyon dam C. high demand downstream D. lack of rain and snow downstream