c|net: A 'geoengineering cocktail' is the latest last-ditch proposal to reverse climate change.
Cirrus clouds, which are those wispy rippled structures that form at high altitudes over 20,000 feet, are something of a nephological anomaly. Lower thick clouds tend to reflect more sunlight (shortwave radiation) than they absorb heat (longwave radiation), leading to a cooling effect, but cirrus clouds do the opposite.
Well now, take your chemtrails and smoke 'em. Contrails, in the right conditions, turn into cirrus clouds and encourage further cirrus formation. No need for large volumes of liquid; just fly in the tropopause. Maybe airliners *are* contributing to warming ...