What are ecosystem services?
a. neoclassical economics
b. GPI
c. These are essential processes such as soil formation, nutrient cycles, the pollination of plants, etc.
d. the "invisible hand"
Answer: c. These are essential processes such as soil formation, nutrient cycles, the pollination of plants, etc.
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Arid climates (B) are not found in the Southern Hemisphere
a. True b. False Indicate whether the statement is true or false
The two most abundant elements in the crust are
A. iron and aluminum. B. oxygen and silicon. C. sodium and calcium. D. magnesium and potassium.
The membrane-filtration method of desalination
A. works best on water with low concentrations of dissolved impurities. B. is prohibitively expensive; it would increase the cost of water beyond the reach of most homeowners. C. is efficient but extremely slow compared to other methods. D. All of the choices are correct.
When the Sun and Moon form a right angle with Earth, the ________ occurs and results in the ________ tidal range between low and high tides
A) neap tides; lowest B) tidal bore; highest C) neap tides; greatest D) spring tides; greatest E) spring tides; lowest