Describe how water demands might be reduced in agriculture, industry, and households
What will be an ideal response?
Agriculture can use less water by using (1) a "surge flow method, in which computers control the periodic release of water," or (2) drip irrigation systems. Industry and homes can use less water by using toilets that require less water, putting in xeriscaping, replacing leaking faucets, replacing faucets with low-flow alternatives, and using water displacement devices. Gray water (from sinks, showers, bathtubs, and laundry) can be used for irrigation."
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A key characteristic of aquatic dead zones is ________
A) a high concentration of organisms resulting in extreme competition and finally the death of most B) a low concentration of nitrogen and phosphorus nutrients C) a low concentration of keystone species D) a low concentration of oxygen E) a high concentration of urban development
Which of the following is an excitatory neurotransmitter?
A) b-alanine B) cysteine C) taurine D) none of these
What condition is most necessary to build a glacier?
A) The temperature must be cold enough to cause snow to fall regularly. B) The snow must be able to move downhill slowly. C) The elevation of the area must be high enough to allow snow to fall regularly. D) More snow must fall in the winter than melts in the summer.
Substances that interrupt normal hormone action can impact human health in many ways beyond sexual function.
Answer the following statement true (T) or false (F)