 Methanogenesis is the process by which methanogens convert carbon dioxide and other compounds into methane. Methanogens are microorganisms that can produce methane through fermentation, and they are found in many environments including oceans, lakes, wetlands, and landfills. Biogas plants use methanogens to convert biomass into methane, while microbial electrosynthesis uses electricity to stimulate methanogenic activity. Both techniques have been used to create renewable energy sources and reduce greenhouse gases. This article was authored by Francesca Endsman, Florian Meyer, Michael Rother, and others.