Many dairy, beef and hog operations now use liquid manure systems as a fast and economical method of handling animal wastes. These systems, particularly if they are incorporated into the barn construction, may pose a serious hazard because of gases produced. Decomposing animal manure gives off a variety of gases including hydrogen sulphide, carbon dioxide and methane. Hydrogen sulphide (or manure gas) is the most dangerous of these because it can interfere with your ability to smell it and warn you of its presence.

Protection Against Manure Gas