Impact of aviation’s non-CO2 emissions ‘critical’, says report

Deniz Huseyin
17 July 2025
 

Contrails - produced by aircraft engine exhaust – are a significant contributor to aviation’s non-CO2 impact on climate change, potentially higher than CO2 emissions in some cases, reveals a new report. There is an “urgent need” to examine the non-CO2 impacts of aviation, it states.

Non-CO2 impacts, including contrails and cirrus clouds, nitrogen oxides, water vapour, and aerosol-radiation and aerosol-cloud interactions, collectively represent a “critical...

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