Phosphate mining, mainly the result of seabird excrement or guano, once led the inhabitants of Nauru to be among the wealthiest people on the planet
Indicate whether the statement is true or false
T
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Of the following, which U.S. state has no major areas of oil and gas production?
A) California B) Texas C) North Dakota D) Maine
Second-growth forests ________
A) in North America are mostly in British Columbia and Alaska B) are forests that establish themselves after virgin timber has been removed from an area C) are less abundant on Earth today than they were 500 years ago D) are forests whose timber has second-rate value E) are those forests in the National Parks that are protected from logging
A caldera is formed ____
a. ?when seawater reacts with hot basalt b. ?in volcanoes which do not have enough steam pressure to support solidified magma c. ?from pyroclastic flows d. ?when volcanoes form in freshwater lakes e. ?by the collapse of a magma chamber
The precautionary principle is guided by the idea that we must make decisions that prevent a problem from occurring or worsening.
Answer the following statement true (T) or false (F)