Hydrogen sulfide, a colorless gas that smells like rotten eggs, is produced naturally from decaying matter. This gas is lethal to breathe in, and hydrogen sulfide present in high concentrations ...

A new website by the county's Air Pollution Control District updates hourly with data collected by its two air quality monitoring systems in Nestor and San Ysidro.

We know that these sulfur-producing bacteria can produce hydrogen sulfide, which potentially has some negative effects on gut function." Allen Lee, M.D., M.S., assistant professor of internal ...