A small residential pond in the middle of an urban housing development is most likely
A) a natural pond that happened to be in the region where the homes were built.
B) part of a storm-water management system, to reduce erosion from runoff.
C) constructed specifically as a source of water for people to use to irrigate their lawns.
D) part of the sewage treatment facility that serves the homes in this region.
B
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Only about 2.5% of all the water on our planet is fresh water, and ________
A) most of this is far from where humans live B) over half of this is in wetlands near coastlines and is becoming contaminated with saltwater C) over half of this is extremely hard water and is nearly unusable for drinking or agriculture D) most of this is in underground aquifers E) most of this is in large, freshwater lakes
How many bonds between nitrogen and hydrogen are formed if you react nitrogen with hydrogen according to the following reaction? N2 + 3H2 ? 2 NH3
A) 6 B) 2 C) 3 D) 1 E) 8
Which of the following types of transportation consumes the most energy (in BTU per passenger mile)?
A) bus B) commuter rail C) automobiles D) heavy rail
Carmakers' assembly plants account for around ________ percent of the value of the vehicles that bear their names, with ________ percent coming from outsourced, independent parts makers
A) 10; 90 B) 20; 80 C) 30; 70 D) 50; 50 E) 60; 40