A study, commissioned by the Department of Defense (DoD) environmental research programmes and carried out by ICF International, says the power-production potential is equal to 25% of California’s 2015 utility renewable-energy requirement.

The DoD, the largest US energy consumer with a $4bn annual bill, has become a leading advocate for and consumer of renewable energy as it looks to mitigate security risks associated with fossil fuels and centralised, grid-connected electricity generation.

Renewable