The flow of current through the water produced hydrogen and oxygen.

The hydrogen produced is stored in special tanks under pressure.

In a few countries, renewable sources are being used more widely to produce energy and hydrogen.

Electricity can be used to produce hydrogen but it's relatively expensive.

Excess power during rough seas could be used to produce hydrogen.

Many strains are able to produce hydrogen naturally, and focus exists to improve on these.

Still, outside experts say those tanks also produce hydrogen, and may be vulnerable to earthquake.

The use of solar energy to produce hydrogen as a fuel from water has aroused much scientific interest over recent years.

Solar and wind energy sources are being installed to produce renewable hydrogen.

The system produces hydrogen at a rate five times greater than the previous record-setting method.