The most common minerals found in soils are combinations of which four most commonly found elements in Earth's crust?
a. carbon, hydrogen, oxygen, nitrogen
b. silicon, aluminum, oxygen, iron
c. potassium, zinc, copper, iodine
d. silicon, hydrogen, oxygen, nitrogen
B
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What is the acronym of the major political and military agreement which was made between the United States and its Europe allies shortly after the end of WWII?
A) North American Free Trade Agreement (NAFTA) B) North Atlantic Treaty Organization (NATO) C) International Joint Commission D) Organization of American States (OAS) E) United Nations (UN)
“Factor 4” and “Factor 10” advocates are in favor of what concept?
a) Sustainability through off-grid living b) Community land trust models c) Internalizing environmental costs d) Dematerialization
Because it does not affect the crop yield or nutritional value, a local grower advertises that in his orchard he does not use
A) cosmetic spraying. B) insurance spraying. C) crop rotation. D) natural predators.
A rapidly changing climate is least likely to affect ____.
A. where food can be grown B. how much food can be grown C. the frequency and severity of droughts or flooding D. where people and wildlife will be able to live E. timing of tides