Which of the following best matches the description?Mining in which the material is removed without disturbing the top layer of soil.
A. reserves
B. passive solar system
C. nonrenewable energy sources
D. acid mine drainage
E. overburden
F. photovoltaic cell
G. renewable energy sources
H. surface mining
I. secondary recovery
J. geothermal energy
K. resources
L. liquefied natural gas
M. active solar system
N. underground mining
O. black lung disease
Answer: N
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