unsustainable definition, meaning - what is unsustainable in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “unsustainable”

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unsustainable

adjective uk   us   /ˌʌn.səˈsteɪ.nə.bəl/
C2 Something that is unsustainable cannot continue at the same rate: This level of spending on pensions is unsustainable.C2 causing damage to the environment by using more of something than can be replaced naturally: unsustainable fishing methods
(Definition of unsustainable from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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