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unsustainable (B2)

adjective

Pronunciation: /ˌʌnsəˈsteɪnəbl/

Not able to be maintained at a certain rate or level, especially in terms of environmental impact or economic viability.

The current rate of deforestation is unsustainable.
Their business model proved to be unsustainable in the long run.
We need to find more sustainable energy sources to replace unsustainable fossil fuels.

unsustainable for (prepositional phrase): Unable to be maintained because of a specific reason or entity. — "This level of pollution is unsustainable for the local ecosystem."
unsustainable to (prepositional phrase): Unable to be maintained in relation to a particular action or goal. — "Continuing to use single-use plastics is unsustainable to our environmental goals."

Words with a similar meaning to unsustainable:

Words with the opposite meaning to unsustainable: