Quotes About Hydrogen sulfide

The cyanobacteria, a group of photosynthetic bacteria tinted blue-green by chlorophyll and other pigments, harvest sunlight and fix CO2 much like eukaryotic algae and land plants. However, when hydrogen sulfide (H2S, well known for its "rotten egg" smell) is present, many cyanobacteria use this gas rather than water to supply the electrons needed for photosynthesis. Sulfur and sulfate are formed as by-products, but oxygen is not.

Hydrogen sulfide is as lethal, molecule for molecule, as cyanide. This may explain why humans evolved such exquisite sensitivity to its smell.

Morning breath" is hydrogen sulfide released by bacteria consuming shed tongue cells while you mouth-breathe for eight hours; saliva normally washes the debris away.