Water is needed for development, production and consumption, yet we are overusing and polluting an unsubstitutable resource and system.
Eight safe and just boundaries for five domains (climate, biosphere, water, nutrients and aerosols) have been identified beyond which there is significant harm to humans and nature and the risk of crossing tipping points increases. Humans have already crossed the safe and just Earth System Boundaries for water.
To date, seven of the eight boundaries have been crossed, and although the aerosol boundary has not been crossed at the global level, it has been crossed at city level in many parts of the world.
