Crossword puzzle clue "controversial oil extraction method"

Here are the possible solutions for controversial oil extraction method clue

Answer
Clue
Relevancy
fracking
Clue
Controversial oil-extraction method
Definition
the process of forcing liquid containing sand or other material into the strata round a well bottom to split them and prevent them closing
stripmining
Clue
Controversial coal-extraction method
Controversial coal-extraction process
Controversial excavation method
bodycamera
Clue
Controversial sousveillance method
hydroponics
Clue
Method of growing plants that... look, it's for weed, all right? You use this method to grow weed
Definition
the practice of growing plants in a chemical solution without soil
watercolor
Clue
Non-oil painting method
adit
Clue
Entrance for extraction
Definition
a nearly horizontal shaft to the surface in a mine

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