Which one of the following represents a way to reduce point-source pollution contributing to cultural eutrophication?
A) Increase the use of vegetated waterways
B) Increase the use of contour farming and crop rotation
C) Remove nutrients from sewage-treatment effluents
D) Include runoff detention ponds in subdivisions
C
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Which of the following are secondary messengers?
A) prostaglandins B) thromboxanes C) both a and b D) neither a nor b
The relatively small eruptions of the Icelandic volcano Eyjafjallajokull in 2010 caused major disruptions because the eruptions ____
A)were pyroclastic and debris was thrown as far as three kilometers B)occurred in a densely populated area C)caused tsunamis and disrupted sea trade D)took place beneath a glacier resulting in steam explosions that disrupted air traffic for several days E)caused shallow earthquakes that caused landslides and destroyed buildings
Yugoslavia and its former republics have been a major area of tension and warfare in the 1990s
First discuss the historical, ethnic, linguistic, and religious background of Yugoslavia, and then examine the conflicts of the 1990s, including the reasons for their occurrence and what has been done to settle them.
Air pollution emitted from industrial areas, especially products of combustion, such as oxides of sulfur and nitrogen, can be carried many kilometers downwind. Sometimes these particles and gases slowly settle to the ground in the dry form of ____
a. acid fog b. acid rain c. acid precipitation d. dry deposition e. wet deposition