Although there is not yet enough data to document chronic exposure, readings taken in South County indicate cause for concern.

Known as Rule 36, the rules require energy companies operating in high-H2S areas to measure concentrations, train their employees, put up warning signs and, in some cases, monitor for leaks.

Hydrogen sulfide gas has the unmistakable aroma of rotten ... Each island was a gold nanoparticle about 10 billionths of a meter across that would interact strongly with a specific wavelength of ...