Increased crop yields in the U.S. are the result of
A. more efficient machinery.
B. the application of fertilizers.
C. improved agricultural methods.
D. All of these are correct.
Answer: D
Environmental & Atmospheric Sciences
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a. inorganic fertilizer b. runoff of animal wastes from feedlots c. Detergents d. acid rain e. Rocks
Environmental & Atmospheric Sciences
The most visible signs of human activities, such as cities, factories, and power plants, will not be strongly recorded in the rock record
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
These compounds are made entirely of hydrogen and carbon: ________
Fill in the blank(s) with the appropriate word(s).
Environmental & Atmospheric Sciences
An anomaly of the element ________ marks the Cretaceous-Tertiary boundary in several locations around the world
Fill in the blank(s) with correct word
Environmental & Atmospheric Sciences