Sewage treatment is low or absent in many parts of the World, leading to eutrophication of the coastal zone, (toxic) algae blooms and dramatically reduce the ability of coral to recover from bleaching events dramatically. The data reflects the bodies of the UNEP Regional Seas programme.

This chart shows eight different sources of renewable energy and explains advantages and drawbacks of each - wind, sun (photovoltaic and thermal), geothermal, wood, ocean, waste, water (hydroelectricity).

The contaminants in waste- water come from many different sources and can have cumulative and synergistic effects requiring a multi-pronged response.

Estimating mitigation costs is a complex task that incorporates a high degree of uncertainty due to the variety of factors involved. However, this exercise provides valuable information to design mitigation strategies. Estimates for Mexico show the substantial economic benefits to be gained from a strategy that considers the transport sector, coupled with the amount of emissions could be reduced. It also highlights the lower costs associated to m...

Graphic captioning the time at which Waste water will become suitable levels of consumption.