Many of you will have come across hydrogen sulphide (H2S). If you have ever cracked a rotten egg the distinctive smell is H2S.
H2S is a hazardous gas that is found in many work environments, and even at low concentrations it is toxic. It can be a product of man-made process or a by-product of natural decomposition. From offshore oil production to sewerage works, petrochemical plants to farms and fishing vessels, H2S presents a real hazard to workers.