: Regulated by temperature-dependent and moisture-dependent decomposition of soil organic matter.

: Reductions in sulfate deposition have been linked to shifts in the nature of Natural Organic Matter (NOM) , making it more hydrophobic and colored in certain "brown water" environments.

Explain the role of in cellular energy production.

: In prebiotic chemistry, sulfur biomolecules like cysteine , taurine , and methionine can be produced through atmospheric organic haze chemistry independent of biological life .