PowerSwitch

Contrails: How tweaking flight plans can help the climate:
https://www.bbc.co.uk/news/business-58769351

Contrails, which heighten the effect of global warming, may account for more than 57% of the entire climate impact of aviation

Whilst reducing the impact of high altitude condensation trails, this does nothing to reduce carbon dioxide emissions.

The only way to meaningfully reduce carbon dioxide from aviation is to fly less.

Their NOx emissions into the stratosphere are also particularly harmful.

".....may account for more than 57% of the entire climate impact of aviation......"

Or on the other hand indeed they may not......

Things that are claimed may do something nearly get on my tit as much
as claims for impacts or effects up to to some impressive figure.

Cynically misleading nonsense.