unsustainable
adjective
uk/ˌʌnsəˈsteɪnəbəl/ usthat cannot continue at the same rate:
They are suffering a serious increase in inflation and an unsustainable boom in house prices.
unsustainable level/pace/rate Public borrowing had reached an unsustainable level of 8% of GDP.
unsustainable debt/deficit The economy is running an unsustainable deficit, making tax increases inevitable.
NATURAL RESOURCES
causing damage to the environment by using more of something than can be replaced naturally:
Unsustainable logging of commercial forests is threatening the industry's survival beyond 10-15 years.
In March, 50,000 people took to the streets of Mallorca to protest the island's unsustainable development.