If you see the symbol "USDA ORGANIC" on a package of food, you know that the product
A) contains no GM or irradiated ingredients.
B) may have been fertilized with sewage sludge.
C) is at least 51% organic.
D) is 100% organic.
A
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The most acute water pollution problems in the world come from ________
A) runoff B) floods C) ocean currents D) wastewater E) recycled water
Which of the following minerals is a sulfide and commonly forms cube-shaped crystals?
A. halite B. hematite C. dolomite D. pyrite E. gypsum
The Agricultural Revolution began in Europe around 15,000 years ago
a. True b. False Indicate whether the statement is true or false
Which of the following is associated with a mid-ocean ridge?
A. continental rift B. an island arc C. melting of the subducting plate D. lower topography than surrounding seafloor E. magma produced as the mantle rises up