Carbon monoxide: sources and sinks Sources Such as automobiles Incomplete combustion(internal engine) Biomass burning Methane oxidation Oxidation of non-methane hydrocarbon Decay of plant matter Sink Reaction with OH radical OH+CO→C02+H H·+02+M→HO2:+M Removal by soil microorganismCarbon monoxide: sources and sinks • Sources – Incomplete combustion (internal engine) – Biomass burning – Methane oxidation – Oxidation of non-methane hydrocarbon – Decay of plant matter • Sink – Reaction with OH radical .OH + CO → CO2 + H. H . + O2 + M → HO2. + M – Removal by soil microorganism Such as automobiles