For a man who was staring death in the face a few weeks ago, trapped in the twisted wreckage of a light aircraft with aviation fuel leaking all around him, Nigel Farage is on remarkably good form.

BBC: What now for UKIP's Nigel Farage?

Once the energy trapped in coal is unleashed and its carbon sequestered, energy-laden hydrogen can be used directly in fuel cells.

ECONOMIST: The environment