Anaerobic bacteria also leave behind hydrogen sulfide, which gives off an unpleasant rotten egg smell.

Some microorganisms use hydrogen sulfide (rotten egg smell), which rises from deep within the earth, as an energy source.

Hydrogen sulfide is a dangerous substance which at low concentrations has an obnoxious rotten egg smell.

Their presence can be identified by the release of hydrogen sulfide gas with its rotten egg smell when the can is first opened.

All that remained was the rotten egg smell.

If only the damned rotten egg smell would go away!

Nancy noticed the rotten egg smell of sul- phur.

The humid air stank of blood and of the rotted egg smell made by powder smoke.

If you've got a finely tuned nose, the egg smell is very in your face at the Thermalstrandbad.

Poor leaching can leave a rotten egg smell.