In surface mining at the tops of mountains, ____
a. huge pits are dug to extract the coal
b. the use of explosives is not permitted
c. the overburden is placed back on the mountain top after the coal is extracted
d. the entire top of the mountain is blasted away
D
You might also like to view...
When all the pores in the upper soil are filled with water, the soil is said to be ____________________
Fill in the blank(s) with correct word
Which of the following may affect an animal's weight?
a. The climate in which it lives b. The number and types of parasites it is exposed to c. The amount and type of feed given to it d. All answers are correct.
The unit of measure for electrical current flow is the __________.
a. Ampere b. Ohm c. Volt d. Watt
Certain crops may be left in the field after harvesting for a period to cure
Indicate whether the statement is true or false