The cost factor tends to make cremation attractive. Generally speaking, cremation is cheaper than a traditional burial service, especially if direct cremation is chosen, in which the body is cremated as soon as legally possible without any sort of services. However, for some even cremation is still relatively expensive, especially as a lot of fuel is required to perform it. Methods to reduce fuel consumption/fuel cost include the use of different fuels (i.e. natural gas or propane, compared to wood) and by using an incinerator (retort) (closed cabin) rather than an open fire.