The concept is beautifully simple: take intermittent wind-generated electricity from the North Sea, distribute it through the power grid, using some of it to charge future Audi e-Tron electric cars, then take the rest to power hydrogen electrolysis. Next, take that hydrogen and chemically combine it with atmospheric carbon dioxide and produce a synthetic methane, which can be distributed through natural gas pipelines and stored for later use in compressed natural gas vehicles.

The concept is explained in this Audio produced video.