His speciality for a long time, before he had developed the technology he needed, was fuzziness or rather, that interesting gradation of shading, pinpointed by hydrogen atoms, that showed where the water content of the cells was changing, and tissues were becoming diseased.

ECONOMIST: Paul Lauterbur | The

This gas contains approximately 80% of the original energy content of the coal, and is a combination of hydrogen, carbon monoxide, carbon dioxide, and methane.

FORBES: Underground Coal Gasification: A Trend Worth Watching