A renewable energy project based in Shetland has won $10,000 (£5,400) as a runner-up in a major international environmental award.
Pure uses wind power to convert water to hydrogen
The Pure project, on Unst, was among the final three contenders for the St Andrews Prize for the Environment.
The project is the first off-grid renewable hydrogen system in Europe and the first community-owned hydrogen production plant in the world.
It uses wind power to provide sustainable energy.
The other two finalists were a drinking water project in rural Nepal and a farming project in Central America harnessing the benefits of the Maya Nut, which took the top prize.
The Pure (Promoting Unst's Renewable Energy) system enables wind generated electricity to convert water into hydrogen, which is then bottled and kept for converting back into electricity as required.
The result was announced at a ceremony in the University of St Andrews on Tuesday. The St Andrews Prize is an environmental initiative by the university.
Sir Crispin Tickell, chairman of the St Andrews Prize for the Environment Trustees, said: "The prize is going from strength to strength.
"It is now in its eighth year and we are delighted that is has become so well established and continues to attract such a range of innovative projects from all over the world."