greenhouse gas, pollution, carbon, greenhouse emission, air pollution, emitters, nitrogen oxide, pollutant, carbon dioxide, polluters, particulate matter, antipollution, sulfur dioxide, ozone, smog, particulate, sulphur dioxide, soot, sulfur oxide, gases, diesel, sulfur hexafluoride, combustion, hcfc, hydrofluorocarbon, blackbody, decarbonizing, nitrogen dioxide, bact, fossil fuel, global warming, methane, sulfur, cordierite, dioxide, climate change, acid rain, chlorofluorocarbon, ionisation, tailpipe, fluorocarbons, corona discharge, hydrochlorofluorocarbon, decarbonization, hydrogen, photolysis, diesel engine, reflectivity, photometric, reciprocating engine, electroluminescence, luminous efficacy, airglow, enthalpy, coal, environmental, exhaust fumes, refrigerant, emittance, krypton, motorization, decarbonise, permittivity, chromium, ionizing, hydroxyl radical, gasohol, perc, mercury, renewable, halon, irradiance, methyl chloride, biofuel, carbon disulfide, spallation, plasmon, ccx, motorisation, boilers, piezoelectric crystal, retrofits, nitrogen, absorbance, photoluminescence, halide, mpg, luminous flux, gasification, phonon, atmospheric, arc furnace, climate, catalytic converter, nitrification, intermodulation, reflectance, mhd, benzene, smokestacks, biodiesel, nightglow, radiation, absorptions, scattering, ionization, absorption, excitation, fluorescence, emissions, emitter, photons, intensities, luminescence, evaporation, photon, discontinuous, continous, delay, moisture, stress, uninterrupted, amplitude, arbitrary, asynchronous, bandwidth, bidirectional, broadband, characteristic, chronologic, continuous, difference, directional, disproportionate, down, duplex

catamenia, discharge, effluvium, ejaculation, elimination, evacuation, excreting, excretion, exudate, field emission, flow, menses, menstruation, period, photoelectric emission, photoemission, radiation, secondary emission, thermal emission, thermionic emission, venting, voiding

activation energy, alpha decay, atomic number 72, baffle, beta decay, continuous, decay, disintegration, electronics, energy of activation, field emission, glow, hafnium, hf, image orthicon, incandescence, laser, lightning, magnetic storm, maser, optical maser, orthicon, photoemission, quantum jump, radiation, radioactive decay, radioactivity, regulate, secondary emission, seeker, spectrum, thermal emission, thermionic current, thermionic emission, thoriate, transpiration, wet dream

activity, bodily function, bodily process, body process, egress, egression, emergence, flow, flowing, material, release, stuff

discharge, emanation, expelling