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Marsh gas
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Marsh gas, also known as swamp gas or bog gas, is a mixture primarily of methane and smaller amounts of hydrogen sulfide, carbon dioxide, and trace phosphine that is produced naturally within some geographical marshes, swamps, and bogs.
Bubbles of methane, created by methanogens, that are present in the marsh, more commonly known as marsh gas.
Bubbles of methane, created by methanogens, that are present in the marsh, more commonly known as marsh gas.
Hydrogen sulfide
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Hydrogen sulfide is a chemical compound with the formula H2S. It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. Swedish chemist Carl Wilhelm Scheele is credited with having discovered the chemical composition of purified hydrogen sulfide in 1777.
Deposit of sulfur on a rock, caused by volcanic gas
Deposit of sulfur on a rock, caused by volcanic gas
Sludge from a pond; the black color is due to metal sulfides
Sludge from a pond; the black color is due to metal sulfides
A hydrogen sulfide bloom (green) stretching for about 150km along the coast of Namibia. As oxygen-poor water reaches the coast, bacteria in the organi
A hydrogen sulfide bloom (green) stretching for about 150km along the coast of Namibia. As oxygen-poor water reaches the coast, bacteria in the organic-matter rich sediment produce hydrogen sulfide, which is toxic to fish.