Which element do authorities try to limit in pollution prevention approaches in freshwater lake ecosystems?
A) calcium
B) sulphur
C) phosphorus
D) nitrogen
Correct Answer:
Verified
Q17: To which category do nitrates and phosphates
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Q19: Which statement describes the relationship between oxygen
Q20: What will a scientist NOT likely use
Q21: Which stage of cultural eutrophication occurs last?
A) algae
Q23: What causes the death of game fish
Q24: Under what conditions might an oxygen sag
Q25: Which statement characterizes differences between lakes and
Q26: Which Great Lake was first to show
Q27: What is among the successes of Canada's
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