Adding another stamp of legitimacy to Germany's renewable energy law, the Erneuerbare-Energien-Gesetz (EEG), the German federal supreme court has ruled that the law -- which mandates that utilities buy all power from renewables plant at a fixed price -- does not contravene the German constitution. The court also confirms that the EEG complies with European law. It issued its ruling in connection with three cases brought by wind station operators against utility Schleswag, owned by E.on. Claiming that the EEG unreasonably infringed its freedom to pursue its business and thus the German constitution, Schleswag had refused to comply with the law. The ruling is welcomed by environment minister Jürgen Trittin, who has responsibility for renewables. He says he expects the large electricity suppliers to abandon their opposition to renewable energies and "shoulder the responsibility" they hold to wider society. "Renewable energies are a central building block of the government's environment and energy policy. I assume the electricity suppliers will adapt to this situation," he says.