This subject really gets me going.
I have studied these for some time now. Way back in the 60's a farmer friend, "Rocket" Riley from Norton in Rhodesia, used to seed clouds with, I think, silver nitrate, to cause precipitation. This seemed at the time to be a relatively good solution to droughts but over the years I came to realise as many people did that pollution and climate manipulation was not the best thing in the world.
Have a look here after you read below: Chemtrails over Basingstoke, Hampshire.
This is from : http://www.rense.com/general4/fre.htm
"What's the difference between a jet contrail and a chemtrail? According to the U.S. Air Force, jet contrails form above 33,000 feet when hot engine exhaust momentarily condenses ice crystals into pencil-thin vapor trails that quickly vanish like the wake behind a boat.
Chemtrails (CTs) look like contrails initially, but are much thicker, extend across the sky and are often laid down in varying patterns of Xs, tick-tack-toe grids, cross-hatched and parallel lines. Instead of quickly dissipating, chemtrails expand and drip feathers and mare s tails. In 30 minutes or less, they open into wispy formations which join together, forming a thin white veil or a "fake cirrus-type cloud" that persists for hours.
In August 2000, chemtrail watchers began to report "more normal" appearing or nearly invisible jet sprays. However, these reports go on to include cloud formations dripping the feathers and mare s tails just as the chemtrails do. It s our belief that the operation has adjusted the chemtrail mix as word about the phenomenon is spreading and as more and more people are looking up. Observant chemtrail watchers continue to see the "fake cirrus-type clouds" on top of and surrounding real cumulus clouds.
Who is doing the spraying? Witnesses have documented and photographed military KC-135s and KC-10s and white, unmarked jets. Airport personnel and pilots have also confirmed specific commercial airliners to be leaving the long lasting chemtrails.
What's in the chemtrails, and why are they spraying us? We wish we knew. There are only a few planes in the world that have the equipment to analyze the spray mix and can get to the CT altitudes, clearance must be obtained to fly into the trails and money must be raised for the $22,000 per day plane rental fee.
There may be several programs working at the same time. Possibilities include atmospheric and weather modification and biowarfare. Many theorize that it s part of a clandestine operation to implement the New World Order (NWO) by eliminating society s "useless eaters" and the infirm and/or to reduce the population to a support level for the "elite". Originally, it was thought to be mass inoculation for possible biowarfare attack; this theory has been ruled out with the increase of sicknesses and illnesses in the CT paths.
Edward Teller's (inventor of the hydrogen bomb) proposal to reduce global warming to the U.S. involves spraying minute aluminum particles to deflect the sun s harmful ultraviolet rays but still allow the Earth s heat to rise through them. This seems to be supported by rainwater tests after heavy spraying in Espanola, Canada which contained 7 times the allowable limit of aluminum. In this instance, the areas with the least ultraviolet protection, as in the Southwest, would be the heaviest sprayed. Most often, this does not seem to be the case.
Generally, spraying increases as clouds build. Chemtrails may be the reason that over half the world and over half the U.S. have been experiencing drought for the past 2 years. Witnesses have reported watching chemtrails fall through cumulus clouds, leaving the real clouds "skinny" and within a few minutes totally gone. Typically, storm clouds build and mix with the chem ingredients, resulting in a grey, uniform "mucky" sky which doesn't rain. The real clouds disappear, leaving behind the chem formations which were on top of the storm system."
You may not want to believe it but have a look at it.