Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management. Perspectives are like filters: they compile and structure the information that relate to a given focus theme, region or context. This allows you to quickly navigate to the content of your particular interest while promoting the holistic understanding of sustainable sanitation and water management.
Patrick Déry applies in this paper the Hubbert linearisation to phosphorus production to estimate the timeline. The focus lies especially on the peak of production because trouble will start already at this point.
DERY, P. ANDERSON, B. (2007): Peak Phosphorus. Energy Bulletin. Santa Rosa: Post Carbon Institute URL [Accessed: 20.01.2011]