Which sectors do they cover (e.g. electricity generation, heat production, transport fuels)? The latter must be set with careful consideration for any possible overlaps or conflicting interactions with other economic and financial incentives for clean energy development. In fact, recent analysis on the use of tradable quotas for carbon reduction and renewable energy deployment seems to show that renewable energy support policies do not automatically result in improved performance against carbon reduction targets if there already exists an efficient and binding emission trading scheme.