I want to know the answer to the following question:
What gases come from hydrothermal vents?
All the background I'm provided with is that "The bacteria convert inorganic matter – such as hydrogen sulfide and carbon dioxide from hydrothermal vents, or methane from seeps – to organic matter that feeds themselves and their hosts, while the worms extend their palps into the gas flows to absorb the gases needed by the bacteria.". Is that enough to answer the question?