seawater

When the plant is up and running, 132,000 litres of seawater a second will be sucked in to a system that works like a huge car radiator.

A good thing to note is that deuterium, a stable isotope of hydrogen, is much less expensive and can be found in seawater.

The experiment replicates the reaction between seawater and the stuff that comes up through hydrothermal vents — an energy source for life on Earth, and a possible mechanism by which organisms first developed here.

He claims he worked 22-hour days, had little food, and that his boots began to fall apart in the seawater.

But this idyll is under threat as the seawater levels continue to rise.