There have been a sudden flurry of posts on conspiracy forums because someone noticed this ad: http://www.sanluisobispo.com/classified-ads/ad/1669597 This is assumed to be something new, as they have not seen it before. And as it mentions weather modification it's somehow taken as proof of ongoing geoengineering, and hence the "chemtrail" theory. The problem is that this is simply cloud seeding. It's nothing new. Local municipalities have been doing it for decades, and quite openly. In fact such notices have also been occurring in newspapers for decades. The theorist have just never noticed them before. Here's the law in Washington: http://apps.leg.wa.gov/wac/default.aspx?cite=173-495-070 Or texas: http://www.license.state.tx.us/weather/weatherlaw.htm And here's one from California in 1963 http://www.archive.org/stream/weathermodificat196263calirich/weathermodificat196263calirich_djvu.txt And here's an actual example from Colorado in 1965: http://news.google.com/newspapers?id=kz5lAAAAIBAJ&sjid=j5MNAAAAIBAJ&pg=2423%2C2247469 And California in 1969 http://news.google.com/newspapers?id=xxglAAAAIBAJ&sjid=3w0GAAAAIBAJ&pg=2174,2220508 Sure, it's weather modification. But it's all been going on perfectly openly for over 60 years. Here's Santa Barbra talking about it - since 1948! http://www.countyofsb.org/pwd/pwwater.aspx?id=3740 And here's the records of Cloud Seeding in California, back to 1951 http://www.archive.org/stream/weathermodificat00calirich#page/n3/mode/2up With several similar http://www.archive.org/search.php?q...tion:cawaterres AND subject:"Weather Control"