There has been much discussion of fossil fuel subsidies as both an inefficient use of public tax dollars and a barrier to the scaling up of low- and no-carbon energy sources. As "green" incentives are reduced, the phase-out of fossil fuel subsidies becomes even more urgent in order to reduce market distortions and ensure a level playing field in energy markets. Developing-world subsidies to fossil fuel consumption have attracted the most attention to date. However, fossil fuels also benefit from production subsidies in both developed and developing countries.