https://canariasacross.com/blog/the-canary-in-a-coal-mine-metaphor-understanding-the-significance-and-relevance-of-this-timeless-symbol
Understanding the Canary in a Coal Mine Metaphor: A Symbol of Warning and Environmental Awareness
Dec 6, 2023 - The Canary in a coal mine metaphor is a well-known and widely used idiom that refers to using a sensitive indicator to detect potential dangers or problems in...
canary in a coal mine