US announces $9m prize for solar-powered desalination projects – United States The US Department of Energy (DOE) has announced a $9 million (£7m) prize for successful desalination projects, in a bid to bolster freshwater supply across the US. The Solar Desalination Prize is focused on using solar-thermal energy to extract clean water from sources such as subsurface oil, concentrated brine and municipal facilities. (LINK). HIWI042020-05-05T18:30:59+02:00