Which of the following best matches the description?Technique used to obtain the maximum amount of oil or gas from a well.
A. acid mine drainage
B. underground mining
C. nonrenewable energy sources
D. resources
E. passive solar system
F. black lung disease
G. liquefied natural gas
H. photovoltaic cell
I. geothermal energy
J. overburden
K. active solar system
L. secondary recovery
M. renewable energy sources
N. reserves
O. surface mining
Answer: L
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