The most sustainable worldwide expansion of aquaculture would be the production of

A) herbivorous species in the open ocean.
B) carnivorous species in mangrove swamps.
C) herbivorous species in estuarine waters.
D) carnivorous species in lakes and rivers.


A

Environmental & Atmospheric Sciences

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A 50-kg sack is raised 2 m in the same time a 25-kg sack is raised 4 m. Compared to the power needed to raise the 25-kg sack, the power needed to lift the 50-kg sack is

A. half as much. B. twice as much. C. the same. D. none of the above

Environmental & Atmospheric Sciences

By 2025, demographers predict that what percentage of the world will be urbanized?

A) almost 90% B) about 60% C) approximately 30% D) about 53% E) a little less than 70%

Environmental & Atmospheric Sciences

The Sahara and Australian deserts (among others) are associated with the ________.

a. polar high b. subtropical high c. equatorial low d. subpolar low

Environmental & Atmospheric Sciences

What is the most plentiful primary pollutant?

A. ozone B. carbon monoxide C. sulfur compounds D. carbon dioxide E. nitrogen compounds

Environmental & Atmospheric Sciences