open emission trading

open emissions trading program

open burning and open detonation (OBOD) (= open-pit)

military trading organization (Naafi, UK; post exchange, US)

carbon trading

open country / open ground

emission control (EMCON)

emission control plan

light amplification by stimulated emission of radiation (laser)

Microwave Amplification by Stimulated Emission of Radiation (maser)

radar emission

fume emission

exhaust smoke emission

cruise emission parameter(s)

atmospheric emission

reduce emission

non-organized industrial emission(s)

targeted emission reduction

aircraft engine emission

alternate emission methodology

domestic aviation emission(s)

emission alteration

emission cap

emission certification method

emission control

emission control through operational practice

emission credit

emission index

emission inventory

emission level

emission limit(s)

emission parameter(s)

emission rate