Economic Commission for Europe 8 . The programmes of ECE in energy comprise four major areas of activity : ( a ) fuel-related programmes and new and renewable sources of energy ; ( b ) interaction with other related areas such as the environment ; ( c ) decision-making in the field of energy involving working parties on coal ( WPC ) , gas ( WPG ) and electric power ( WPE ) and the Committee on Energy ; and ( d ) the Energy Efficiency 2000 Project .