on (WTO) and the climate protection regime – potential conflict and mutual supportiveness. From the subsidy law perspective, a potential source of conflict might be found between the Members’ policies on promotion of renewable sources of energy, encouraged by the Kyoto regime, and the WTO rules which constrain the use of subsidies. To avoid any potential conflict, the policy response might be to consider reviving the greenlight category, which expired in 1999, for certain environmental subsidies.1 This paper will focus on the other side of