[evnp]

Aren't the impacts perpetual if we're creating new contrails every single day?

Taken from another comment, this seems pretty clear:

> Contrail cirrus may be air traffic's largest radiative forcing component, larger than all CO2 accumulated from aviation, and could triple from a 2006 baseline to 160–180 mW/m2 by 2050 without intervention.

[1] https://en.wikipedia.org/wiki/Contrail#Impacts_on_climate

The original article describes associated costs in time and fuel usage in the realm of 1% increase.