The Ministry of Defence collects and collates information on: energy used in its buildings; quantities of aviation, marine and ground fuels supplied to the armed forces and for their logistical support; and road and air mileage travelled by military and civilian personnel and ministers on business. This information is converted to carbon dioxide equivalent emissions using the Government’s conversion factors and reported each year in the Department’s Sustainable Development Report. Building emissions data are validated by the Building Research Establishment and provided annually to the Sustainable Development Commission for its assessment of the Department’s performance against the Sustainable Operations on the Government Estate energy efficiency and carbon dioxide emissions reduction targets.