The United States imports nearly all of the following minerals:

Check all that apply.
a. graphite
b. feldspar
c. manganese
d. quartz
e. strontium


Answer is a. b. c. d. and e (The United States is dependent on imports for the following 22 mineral commodities: Arsenic, asbestos, cesium, feldspar, fluorspar, gallium, natural graphite, indium, manganese, natural sheet mica, nepheline syenite, niobium, industrial quartz crystal, rare earths, rubidium, scandium, strontium, tantalum, thallium, thorium, vanadium, and yttrium.)

Environmental & Atmospheric Sciences

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Different air masses have different stability because

A) the horizontal temperature variation within an air mass is fairly uniform. B) the horizontal temperature variation within an air mass is not uniform. C) the vertical temperature variation within an air mass is fairly uniform. D) the vertical temperature variation within an air mass is not uniform.

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What trade agreement increased the growth of maquiladoras?

A) MERCOSUR B) CAFTA C) NAFTA D) CARICOM E) ALBA

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Where is the majority of Earth's freshwater being stored?

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