What properties have contributed to plastics being considered a miracle substance? How do those same properties cause plastics to be unusually persistent and damaging in the marine environment?
What will be an ideal response?
The very same properties that make plastics so advantageous make them unusually persistent and damaging when released into the marine environment: They are lightweight, so they float and concentrate at the surface; They are strong, so they entangle marine organisms; They are durable, so they don't biodegrade easily, causing them to last almost indefinitely; They are inexpensive, so they are mass-produced and used in almost everything.
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The major agent of erosion in the desert is
A) wave action. B) ice. C) wind. D) groundwater.
In the following areas, what are the disciplines for Geology?
a. Stratigraphy b. Petrology c. Geochemistry d. Hydrogeology e. Seismology f. Geography g. All of the above except f
The provision of services constitutes this form of employment
A) primary B) secondary C) tertiary D) quaternary E) none of the above
Of the 40 worst disasters between 1970 and 2013, the most frequent mega-killers were hurricanes and earthquakes.
Answer the following statement true (T) or false (F)