climate canary - definition and synonyms

noun
  1.   From our crowdsourced Open Dictionary
    an unexpected change in something from the natural world which is caused by climate change, and which indicates that much bigger environmental problems are likely in the future

    As 2015 closes, it is easy to feel daunted by the future - even overwhelmed. In a year that saw the world pass the historic 400PPM of atmospheric carbon for the first time in a long time, and with global temperature records seeming to be broken on a now regular basis, it is easy to feel alarmed by the mounting climate canary.

    Submitted by Kerry on 18/03/2016