1. They turn otherwise tolerable columnists into bags of marsh gas . 2. Mr Lai collapsed from oxygen deficiency, or toxic marsh gas , and suffered serious brain damage. 3. Gwyn is harassed by columns of flame, which he tries to convince himself are merely marsh gas . 4. It would be methane or marsh gas . 5. Is there a scientific explanation for why will-o'- the-wisp marsh gas lights move away as the observer approaches? 6. The Doctor, Lasky and Travers attempt to break into the bridge, but it is filled with marsh gas . 7. Marsh gases mingle with refinery sulphur.8. In 1776 Alessandro Volta, while a guest of the Castiglioni family in Angera, discovered marsh gas , or methane, here. 9. Whether it's an appropriate analogy, or whether like so much business theory it's a load of marsh gas , is another question. 10. When he was a boy living in West Sussex, England, he was intrigued by the combustible marsh gas in a nearby pond.