1.   Apparently they were thriving on hydrogen sulphide from the rotting beams of the ship.

2.   Gas compositions are normalised to exclude hydrogen sulphide because of poor analytical reproducibility for this gas.

3.   Hydrogen sulphide can destroy both plants and fish.

4.   Hydrogen sulphide was probably a relatively rare commodity, even in ancient times.

5.   Instead of splitting hydrogen sulphide, they developed the ability to split water by first trapping solar energy in green pigments.

6.   So the sewage goes Septic, giving off hydrogen sulphide which corrodes the pipes and makes a nasty smell.

7.   These included methane, ammonia, probably hydrogen cyanide, hydrogen sulphide and carbon monoxide.

8.   ...hydrogen sulphide.

9.   Fish stocks in the Baltic are in decline as a result of the de-oxygenation and increase of hydrogen sulphide in the water.

10.   According to an engineer involved in the project, the resulting rotting vegetation will not only generate methane, but also hydrogen sulphide, ammonia and carbon dioxide.