Indeed, public pension systems are unsustainable and generate important public debt, which strongly weights on economic growth.
In longer periods of poverty past savings are depleted, household goods deteriorate and cannot be replaced, and debts accrue and become unsustainable.
However, the consequent overvaluation tends to generate unsustainable current account deficits that only continued inflows of capital can finance.
Examples of externalities include negative environmental effects such as pollution and the unsustainable depletion of natural resources.
Even if off by 50 per cent, those projections foretell an utterly unsustainable situation.
The few small ruminant development programmes undertaken so far have been for the most part unsuccessful or unsustainable.
In this case the carbon contract results in lower rate of soil carbon loss, but the system remains unsustainable.
Given the ecological conditions, individual investments in groundwater exploitation may prove to be costly and unsustainable.
