This thought-provoking text raises doubts, however, about the measurability of sustainable development. Has the paradigm run its course? The answer is a guarded ‘yes’ – guarded because the concept still carries considerable environmental goodwill. At the same time the opaque concept fosters contradictory policy advice, or worse, inaction. Do we need zero- or accelerated economic growth? Should we reduce conspicuous consumption or enjoy spending as we see fit? Will rules and regulation or adjusted markets prevent environmental disaster?