A foul odor plagued the city of Kings Mountain this winter as cold weather unearthed a long-submerged gas. Mining company ...

The hydrogen can then combine with sulfur in the water and form hydrogen sulfide. The offensive odor of hydrogen sulfide generally makes testing unnecessary. Most people know when hydrogen sulfide is ...

Last week, they announced a temporary halt to their work when their monitors detected hydrogen sulfide and hydrogen ... to ...

Since the end of November, the San Diego Air Pollution Control District has measured hydrogen sulfide levels above the California safety threshold in the Nestor area more than 15 times.