Two powerful backers have signed on to a 2,100-megawatt transmission project to bring renewable generation from Iowa to Illinois. German energy engineering firm Siemens and Copenhagen Infrastructure Partners, a Danish fund specializing in renewables, acquired the SOO Green Renewable Rail from its developer, the Wall Street Journal reported. Siemens will also supply the high-voltage DC equipment for the effort. Optimal sites for large-scale renewables development often lie far from the dense urban areas with high demand for power.