In this paper we show that both climate models and economic models studying the effects of climate change are characterized by high uncertainty. Hence, far reaching policy implications such as the net zero goal lack a definite scientific foundation. Neverthelss, it cannot be excluded that the...

Introduction -- Sustainable Public Debt: Theory and Empirical Evidence -- Debt and Growth: A Basic Endogenous Growth Model -- Productive Government Spending, Public Debt and Growth -- Government Debt and Human Capital Formation -- Debt and Growth: Empirical Evidence -- Conclusion.