on God's green earth

See also: on God's green Earth

English

Expletive used for emphasis after an interrogative word.
Synonyms: on earth; see also Thesaurus:the dickens
- 2022 August 31, Tamar Haspel, “Sorry, Scoville. Peppers deserve better than an archaic heat scale.”, in The Washington Post‎^[1]:
  What was state of the art in 1912 has mostly fallen by the wayside. […] So why, oh why, on God’s green Earth are we still measuring chile pepper heat on the Scoville scale?