The following definitions reflect those used by the International Energy Agency (IEA); definitions used by other organisations and publications may vary.
nationally appropriate mitigation action
national allocation plan, under the EU ETS, each government must produce a national allocation plan
national balancing point
Nuclear Energy Agency (an agency within the OECD)
National Energy Commission (China)
New European Driving Cycle
New Energy Externalities Development for Sustainability (research project for the European Commission)
Network of Expertise in Energy Technology, an initiative to enhance collaboration between OECD and non-member countries (launched in May 2006)
National Emergency Strategy Organisation (from the IEA’s Emergency Policy Division)
Synchronous grid operation of northern, eastern, western and north-eastern grids (India)
natural gas combined cycle
natural gas liquid
natural gas open-cycle
natural gas vehicle
not in my backyard
national oil company
New York Mercantile Exchange
near-zero emissions coal project
natural decline rate
the base production decline rate of an oil or gas field without intervention to enhance production.
natural gas liquids
the liquid or liquefied hydrocarbons produced in the manufacture, purification and stabilisation of natural gas. These are those portions of natural gas which are recovered as liquids in separators, field facilities, or gas processing plants. NGLs include but are not limited to ethane, propane, butane, pentane, natural gasoline and condensates.
allows a country to sell allowances if its emissions are below the target, but does not oblige it to buy allowances if emissions are above.
fuels used for chemical feedstocks and non-energy products. Examples of non-energy products include lubricants, paraffin waxes, coal tars, and oils used as timber preservatives.