Glossary term(s): sustainable production sustainable use Summary: Ecological limits assessed in terms of sustainable production and consumption Explore content Specific Indicator 4.2.1: Human appropriation of net primary productivity Specific Indicator 4.2.2: Human appropriation of fresh water (water footprint) Specific Indicator 4.2.3: Change in water use efficiency over time Specific Indicator 4.2.4: Level of water stress: freshwater withdrawal as a proportion of available freshwater resources