text: It is a greenhouse gas with warming properties more than 7,000 times that of carbon dioxide over a 100-year period, and, as such, is one of the most potent greenhouse gasses ever discovered. Its concentration in the atmosphere is approximately 0.18 parts per trillion. The compound can persist in the atmosphere for up to 500 years. Sulfur hexafluoride, however, has a GWP of 23,900, which would make it much more powerful.