This MRAT explains the controls which must be in place when making or using purchased compost in gardening activities.

Controlling the gases arising from the use of oxygen and acetylene, consisting mainly of carbon dioxide with the addition of oxides of nitrogen where an oxidising flame is used, and carbon monoxide.

Products generated by the combustion of fuels are mainly carbon dioxide and water together with traces of carbon monoxide, hydrocarbons, nitrogen oxides, sulfur oxides and organic lead compounds.

This gives the instructions for making the many of the component parts and assembling the cabinet. It is accompanied by CAD files for use on a laser cutter and 3D printer to produce those components. Some parts have to be purchaased and some can be either 3D  printed or purchased.