Biogas-tech startup Sistema.bio has secured $15 million in funding to fuel its global growth.The financing was led by ElectriFI, managed by the EDFI Management Company, and completely funded by Sistema.bio's existing investors.Sistema.bio's biogas technology helps small-scale farmers turn waste into clean biogas and nutrient-rich biofertilizer.The funding will be used to scale operations, enhance technology, and reach one million farmers by 2025.