Radon Gas

 A colourless, odourless naturally occurring radioactive gas.

This gas is prevalent in granite areas but can occur almost anywhere. Granite is naturally rich in uranium. It is widely held that continued exposure to Radon Gas is a major cause of lung cancer. 

 A colourless gas formed by the decomposition of organic material. The gas is flammable and potentially explosive even in relatively low concentrations.

This gas is common on or near landfill site’s, mining areas etc. This gas becomes explosive at concentrations of 5% subject to an ignition source. 

 A colourless gas which in sufficient concentrations can cause asphyxiation. Often associated with landfill areas. It is formed by the oxidization of carbon. 

  A range of hazardous substances  often associated with the petrochemical Industry. Typically found in disused petrol stations and industrial sites.