Living Machine

The World Health Organization policy brief on Water Health and Ecosystems includes the following recommendation:  "Natural ecosystems have intricate and resilient mechanisms that filter and replenish freshwater resources and sustain marine environments. Although human technologies may enhance or replicate these mechanisms in some settings, protection of the natural watershed also is critical. An 'ecosystem approach' recognizes and ascribes value, including economic value, to the 'services' natural ecosystems provide in terms of water filtration and purification, and ensures their sustainability, through modern management regimes."