Dont know if this was posted, did a search but its pretty interesting. Enjoy. Here is what its about.
"NASA is playing God, its making its own weather" - Jeremy Clarkson, heads to Mississippi where NASA test their Space Shuttle solid rocket boosters,
consuming half a million gallons of fuel. During this test NASA manage to create artificial clouds.
And also generating a lot more water than a jet, and in a fixed space with already high humdity by the look of it - so yeah - add lots (and lots and
lots) of water vapour to that and you get...tah da - clouds...and even rain.....which is what you should expect when you add so much water to an
already "wet" atmosphere.
Maybe you guys should pay some attention to the vast amount of fuel that was used to generate such a small cloud. That itself should help you realize
the fallacies of topics such as “chamtrails”. It should also be noted that much of that cloud is generated by steam from the noise abatement
systems used to keep the engines from ripping themselves apart. A rocket engine by itself, with no noise abatement makes very little smoke or
clouds:
Cloud seeding usually uses silver iodide (AgI). If you consumed a large amount of it it would not be good, but the amount used for cloud seeding is
miniscule.
cloud seeding affects the precipitation from clouds - eg making it rain before it will hail, or forcing rain or snow over particular areas.
it's effectiveness has never been positively established AFAIK, but people & organisations seem happy enough with it to pay for it.