Dals-Ed is a municipality in southwest Sweden, in the county of Västra Götaland. The municipality covers an area of 728.0 km². Of the total population of 5047, 2567 are male, and 2480 are female. The population density of the community is 7 inhabitants per km².
... release oxygen. One significant group of such organism are bacteria which use hydrogen sulfide instead of water in their photosynthetic pathway:
CO2 + 2 H2S → CH2O ...