Download or read book Beware of Manure Gas written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Safety Council presents the fact sheet "Beware of Manure Gas." The council explains that manure pits can be deficient of oxygen and can be toxic and explosive. The gases that are of primary concern are hydrogen sulfide, carbon dioxide, ammonia, and methane.