For example, several tariffs in the EU are indexed to inflation and adjusted on an annual basis. In the UK retail price index (which includes the price of electricity in its basket) indexation exists on the renewable obligation certificate (ROC) system (onshore wind farms receive 1 certificate, offshore 2) - though this is likely to be grandfathered into a new structure (feed-in tariff with a contract for difference FiT CfD). In projects where specific inflation protection is not provided, high current cash flows provide a certain level of inflation protection. Finally, the assets provide a hedge to energy inflation as they have long useful lives and potentially benefit from scarcity value in the future (i.e. fewer desirable wind/solar sites).