A few months back we had such thick chemtrails that a thick acrid fog came down across the South Coast of the UK. Since then, we get increasing numbers of foggy evenings. It occurred to me that this is an objective because it is the perfect blanket for keeping the earth warming at night, so this could be a key geo-engineering project, forming ground level fog. It also helps deliver toxins to people.
It then occurred to me with horror, that dry ice at night clubs is predictive programming for that reality, one of constant evening fogs.
So I searched the term and indeed, it is something that is done, and that was being experimented on right about the time that the youth culture was being created. Will there come a time when every evening, not just the disco, will be thick, acrid smog, with dry ice laced with other chemicals? Maybe its time to act on this issue folks?
Huffington Post: The science of trying to change the weather was born in that war. A high school dropout with a self-taught knack for research named Vincent J. Schaefer was trying to figure out how to counteract the ice buildup on the wings of bombers when he accidentally discovered how to create snow from dry ice.
In 1946, flying in a plane over Mount Greylock, Massachusetts, he threw dry ice and silver iodide from the cockpit, and precipitation fell. From that came a generation of airborne cloud seeders who fly today in the American west to squeeze a bit more precipitation onto farms and dams below. http://www.huffingtonpost.com/doug-struck/geoengineering-mankind-an_b_185750.html
1946 General Electric’s Vincent Schaefer dropped six pounds of dry ice into a cold cloud over Greylock Peak in the Berkshires, causing an “explosive” growth of three miles in the cloud.  (So, Huffington Post lied, when they said he was a drop out!!)
1950 Harvard meteorologist Wallace Howell seeded New York City skies with dry ice and silver iodide smoke, filling the city’s reservoirs to near capacity. 
 Squires, P. & Smith, E. J., “The Artificial Stimulation of Precipitation by Means of Dry Ice,” Australian Journal of Scientific Research, Series A: Physical Sciences, vol. 2, p.232, 1949AuSRA…2..232S, 1949. Republished at Harvard University: http://articles.adsabs.harvard.edu//full/1949AuSRA
WEATHER MODIFICATION TECHNIQUES (From UK Houses of Parliament) http://www.publications.parliament.uk/pa/cm200910/cmselect/cmsctech/221/22105.htm
24. While there was a measure of debate that some—CDR, in particular—technologies fell within the definition of geoengineering, there was greater disagreement about weather modification techniques should be included. The Action Group on Erosion, Technology and Concentration (ETC Group) considered that geoengineering should also encompass weather modification techniques such as hurricane suppression and cloud seeding. Cloud seeding causes precipitation by introducing substances into cumulus clouds that cause condensation. Most seeding uses silver iodide, but dry ice (that is, solid carbon dioxide), propane, and salt are also used.
The Regulation of Geo-Engineering: Cloud seeding causes precipitation by introducing substances into cumulus clouds that cause condensation. Most seeding uses silver iodide, but dry ice (solid carbon dioxide), propane, and salt are also used. At least 30 countries have identified programs and some, like China and the United States, have extensive programs (See Figure 1). Most countries that practice cloud seeding are parties to the ENMOD treaty, but China is not. http://www.google.co.uk/url?sa=t&source=web&cd=22&ved=0CCIQFjABOBQ&url=http%3A%2F%2Fwww.publications.parliament.uk%2Fpa%2Fcm200910%2Fcmselect%2Fcmsctech%2F221%2F221.pdf&rct=j&q=dry%20ice%20geo-engineering&ei=74EGTfy6DsSIhQfrjN3tBw&usg=AFQjCNFv7CQjKHIL5ij-eBb_s8enLRrh0w&sig2=76cH_knUgspe4vsZ9Mlnbg&cad=rja
Moscow Mayor promises no snow this winter: The Air Force arsenal for spraying the clouds includes cement powder, dry ice and silver iodide. Moscow residents can only hope that there's no repeat of an incident that happened... http://esciencenews.com/sources/popsci/2009/10/19/geoengineering.moscow.mayor.promises.no.snow.this.winter http://www.economist.com/node/17414216