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If micro-organisms can be engineered to consume N2O at just slightly higher O2 levels, there would be a drastic reduction in N2O emissions.



After CO2 and CH4, N2O is the most important greenhouse gas.  This gas is produced by micro-organisms in terrestrial and oceanic systems. 

Interestingly, at very low O2 levels (e.g., around 10 micromoles per liter in the ocean), micro-organisms actually consume N2O instead of producing it.  If a micro-organism could be altered to consume N2O at just slightly higher O2 concentrations, and if this organism would still be competitive, N2O emissions would drastically be reduced. 

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Likely several hundred million USD?

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