technically the headline is not wrong. They don't want you to know it is from our own tech(not automobiles)
NASA knew this a while ago.
Stratospheric water vapor affecting atmospheric circulation
https://www.nature.com/articles/s41467-023-39559-2
Water Vapor Confirmed as Major Player in Climate Change
https://www.nasa.gov/topics/earth/features/vapor_warming.html
https://earthobservatory.nasa.gov/global-maps/MYDAL2_M_SKY_WV
Electromagnetic absorption by water
The pure rotation spectrum of water vapor extends into the microwave region.
Liquid water has a broad absorption spectrum in the microwave region, which has been explained in terms of changes in the hydrogen bond network giving rise to a broad, featureless, microwave spectrum.[24] The absorption (equivalent to dielectric loss) is used in microwave ovens to heat food that contains water molecules. A frequency of 2.45 GHz, wavelength 122 mm, is commonly used.
Radiocommunication at GHz frequencies is very difficult in fresh waters and even more so in salt waters.[11]
https://en.wikipedia.org/wiki/Electromagnetic_absorption_by_water
How would one remove a significant amount of a population and not take blame?
Create a natural (so called) disaster like a biblical flood.
Is this plausible?
To blame a population to further your hold upon them.