| sulphur dioxide | 2.76 | Lead, carbon dioxide and sulphur dioxide in the air are down. | ||
| chlorine dioxide | 1.71 | A new supply of chlorine dioxide must be obtained each month. | ||
| plutonium dioxide | 0.26 | The material is non-weapons-grade plutonium dioxide. |
| sulphur dioxide | 2.76 | Lead, carbon dioxide and sulphur dioxide in the air are down. | ||
| chlorine dioxide | 1.71 | A new supply of chlorine dioxide must be obtained each month. | ||
| plutonium dioxide | 0.26 | The material is non-weapons-grade plutonium dioxide. |