 Eco-sufficiency. Eco-sufficiency requires a reduction in the consumption of energy and natural resources and in the generation of waste among which GHG emissions in absolute terms. This goes beyond the goal of increasing eco-efficiency, which focuses on increasing output per unit of input to foster decoupling. Given a very loose relation in rich countries between GDP and human well-being, pursuing eco-sufficiency may be possible without reducing the latter by, for example, increasing leisure and communal activities.