In addition, IRENA estimates that about 80% of Ukraine’s renewable energy potential is in biomass where most biomass operations could be undertaken by agricultural companies. A commission establishes the level of green tariffs. The feed-in tariffs are paid both to new and existing renewable energy plants. The tariff system was revised in July 2015, reducing the level of tariff for solar (which had been among the highest in the world), establishing a fairer system of quarterly euro-indexation and restructuring the local component requirements (moving to a bonus, rather than a mandatory requirement which had been acting as a barrier to investment).3 The revised tariffs are listed in Table 3.3.