Add Yahoo as a preferred source to see more of our stories on Google. A sign offering prayers for the Pemex refinery workers, who were killed by a release of the chemical hydrogen sulfide, is ...

Since Saturday night, unhealthy levels of hydrogen sulfide have been recorded, especially at the one set up at Berry ...

The toxic gas eyed as a possible culprit in the deaths of six dairy workers in Weld County last week is an infrequent but potentially dangerous feature of this type of agricultural work, while experts ...