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Burning hydrogen at high temperatures produces no greenhouse gas emissions but does produce nitrogen oxides, a local pollutant

Burning hydrogen at high temperatures can produce nitrogen oxide (NOx) emissions. This happens because the high combustion temperatures can cause nitrogen and oxygen in the air to react, forming various nitrogen oxides (NOx), including nitric oxide.1 Although hydrogen combustion itself does not produce carbon emissions, NOx emissions can still be a concern, as they are pollutants that can contribute to smog and acid rain.2

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Footnotes​

  1. Department of Energy. (n.d.). Does the use of hydrogen produce air pollutants such as nitrogen oxides?. Department of Energy. https://www.energy.gov/eere/fuelcells/does-use-hydrogen-produce-air-pollutants-such-nitrogen-oxides#:~:text=On the other hand, some,(>1,500°C). ↩

  2. Ibid. ↩