It seems well accepted by people who work in underground environments, often confined spaces, that there is the possibility of finding gases there, such as methane and hydrogen sulphide, but does anyone actually know how they got there?

Cue the music and call for Sherlock!

Lets start by lo...

September 15^th to 21^st is gas safety week, which is an annual event to raise awareness of gas safety and the importance of taking care of domestic gas appliances.  So, what are the gases associated with domestic appliances and why are they so dangerous?