Trace gas Trace gas The most abundant gases in the atmosphere are nitrogen (78.1%), oxygen (20.9%), and argon (0.934%). Combined, oxygen, argon, and nitrogen make up 99.934% of the gases in the atmosphere (not including water vapor). The other gases that are not part of the 99.934% of the atmosphere are called trace gases. The abundance of a trace gas can range from a few parts per trillion (ppt) by volume to several hundred parts per million by volume (ppmv). When a trace gas is added into the atmosphere, that process is called a "source". There are two possible types of sources
Life Among the Ruins bluesy hard rock and melodic metal, more similar to early Whitesnake's recordings than the epic power metal of albums like "Noble Savage" and the following "The Marriage of Heaven and Hell Part I". This is the first album with bassist Rob DeMartino, who replaced Joe O'Reilly, retired from the scene. All lyrics by David DeFeis, music as indicated Life Among the Ruins Life Among the Ruins is the fifth full-length studio album by US heavy metal band Virgin Steele. It was released in 1993, after almost five years of inactivity. The song "Snakeskin Voodoo Man" was present only in the