The spill of cyanide into the Tisza and Danube Rivers in 2000 could have been prevented if
a. the computer systems monitoring the cyanide volume had not crashed
b. fewer people had withdrawn water from the rivers so the overall flow rate was lower
c. an earthquake warning system had been in place to warn dam managers of the impending quake that broke the dam
d. the mining company had installed a stronger containment dam and a backup settling pond to prevent leakage
e. a newer, more technologically sound settling pond had been in place
D
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When a mineral reserve is considered to be depleted, what is the typical percentage of mineral left in the ground?
A. 20% B. 0% C. 5% D. 50%
Vietnam is the most urbanized country in Southeast Asia, and is 95 percent urbanized
Indicate whether the statement is true or false
On a hot day, a tree can transpire hundreds of liters of water
Indicate whether the statement is true or false
One hundred units of coal energy are converted to electricity, which is then used to power an incandescent light bulb that produces 1.2 units of light energy. This results in a 1.2% ________
A) energy return on investment B) energy conversion C) energy conversion efficiency D) consumption E) energy end-use efficiency