|| Potentials for improved energy efficiency of cooking stoves and ovens are large. Taken together, a reasonable estimate is that the potential exists to reduce total worldwide energy consumption and greenhouse gas emissions for residential cooking by more than a third, despite growth in population. Analysis on the use of different cooking fuels suggests that about 88 per cent of all fuel consumed for cooking are biomasses such as wood, dung, crop residues or charcoal. This is due to the large number of biomass users, the low energy content of biomasses and inefficient stove designs. The daily fuelwood consumption alone accounts for about 7 million m³ in absolute terms. It is estimated that the new generation of advanced biomass cookstoves would reduce biomass fuel use and the related CO2 emissions by about 50 percent. This can be several hundred kg of wood and other biomass that one family saves to collect or buy. According to calculations by the WHO, policy interventions aiming to make households switch to more sophisticated cooking fuels or improved stove designs are very cost-efficient. The comparison of costs and benefits arising from such interventions show that in monetary terms about US$ 100 billion per year could be saved by halving the number of people cooking with solid fuels through the provision of access to more sophisticated fuels and improved stove designs. Also in developed countries large potentials for increasing energy efficiency can be found. For example, an energy savings potential of 286 PJ/yr, or almost 50 %, exists in the European Union (EU) (period between 2010 and 2025).