As an approach to marine sustainability, many marine scientists suggest setting aside ____% of the world's oceans as fully protected marine reserves.
A. 50-60
B. 20-40
C. 10-30
D. 5-10
E. 1-3
Answer: C
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Which of the following solutions is the most concentrated?
A. one liter of water with 1 gram of sugar B. one liter of water with 2 grams of sugar C. one liter of water with 10 grams of sugar D. one liter of water with 5 grams of sugar E. They all have the same volume.
The image below shows a beam of radiation passing between two electrically charged plates. 
Which of the beams is due to alpha particles?
A. a B. b C. c D. all of the above E. none of the above
Pollution concentration is
A) determined solely by the quantity of emissions. B) determined solely by the wind speed. C) the quantity of a pollutant found within a specific volume of air. D) always higher during the day than at night.
The society of ________ Island was destroyed by environmental degradation
Fill in the blank(s) with correct word