No they aren't.
It's just water vapour, there's nothing sinister actually going on (and the reason they are left in grid patterns is because aircraft fly in flight lanes that happen to be arranged in grids).
Some contrails disappear while others stay around for a while, it depends on the weather conditions.
2007-11-15 21:17:27
·
answer #1
·
answered by bestonnet_00 7
·
6⤊
1⤋
Does anyone on this planet still teach science? Someone recently posted a question to Y!A stating that her chemistry teacher didn't know what ozone is. We've got a politician telling us "the debate in the scientific community is over." Now, we've got conspiracy theorists proposing sinister explanations for jet aircraft exhaust.
Let's go back to chemistry. Hydrocarbon fuels, such as jet fuel, contain hydrogen and carbon. Burning them oxidizes them, which breaks the bonds of the hydrocarbon molecules and oxygen molecules. The carbon atoms become bound to oxygen atoms, creating carbon dioxide and scaring Al Gore. The hydrogen atoms become bound to oxygen atoms, creating water. That water forms artificial clouds, which scare people who don't understand science, just as the carbon dioxide scares Al Gore. Thus, the jet exhaust does "sort of become clouds" and "stay in the sky long after they have been left there," just like naturally occurring clouds do. How long they remain there depends on atmospheric conditions. If they don't happen to remain there long, atmospheric conditions are probably not conducive to cloud persistence. The trails are left in parallel or grid patterns because of the patterns of air traffic. Even though there are no stripes painted in the sky, air traffic control vectors for aircraft define virtual "lanes" in the sky which result in the regular patterns you see.
You state, "some people theorize that chemicals these sprays are made of are very harmful to people and are causing a wide variety of bad symptoms." Al Gore and conspiracy theorists both believe these things (notwithstanding Gore's use of private jet aircraft). In fact, Al Gore made a whole movie about it.
There are a few things that can be done to stop it. One would be to stop aircraft from flying. There was no such phenomenon caused by civilian aircraft when the entire U.S. airspace was shut down following 9/11/2001, so that's a very effective, albeit inefficient and inconvenient, solution. However, there is hope that global warming will raise the temperature of the atmosphere, which could inhibit condensation of water vapor, which could make aircraft exhaust less visible, so global warming is another potential solution to the problem.
2007-11-16 03:41:50
·
answer #2
·
answered by Rationality Personified 5
·
5⤊
1⤋
How long airline contrails last depends on the weather conditions: they're essentially man-made clouds of water droplets. So if it's dry they'll go away quickly. If it's not they'll last longer. But if you're still worried, the best thing to do is wrap a baseball cap inside and out with aluminum foil (heavy duty is best) and wear it at all times to keep the alien voices amplified by the chemtrails from talking in your head.
2007-11-16 01:13:03
·
answer #3
·
answered by Faeldaz M 4
·
3⤊
0⤋
I have also heard that chemtrails contain various microbial agents and that the CDC then retains data about how many people call in sick to work or school, compile lists of symptoms and compare effectiveness of various treatments. Alternately, the pharmaceutical companies are spreading the various disease causing agents in order to better market whatever new drug is ready to be released: restless leg syndrome, social anxiety disorder, or whatever.
If you notice an increase of your coworkers complaining of RLS or shyness within a few months of a particularly sticky contrail, you should be concerned.
Of course, these theories are propounded by the same people who believe that you can get pregnant by using a public restroom.
2007-11-16 02:10:59
·
answer #4
·
answered by swamp woman 2
·
5⤊
1⤋
Please make or buy a tin foil hat without delay and start wearing it 24/7. This will protect your thought processes from the evil mind control rays being beamed at us from the planet Mongo. Make sure it is real tin foil, as aluminum foil will not work.
2007-11-16 10:32:38
·
answer #5
·
answered by Anonymous
·
3⤊
1⤋
Yes they are, very real. The best protection is to wrap a plastic bag tightly around your head to prevent the ingestion of those sordid chemicals. I do it. People may look at me like I'm a nut and laugh at me, but we'll see who's laughing in the end.
HAHAHAHAHAHAHAHAHAHAHAHAHA!!!!!
2007-11-16 00:27:10
·
answer #6
·
answered by thegubmint 7
·
6⤊
1⤋
Chemtrails are like bonsai kittens - utter nonsense.
2007-11-15 23:32:37
·
answer #7
·
answered by Anonymous
·
4⤊
2⤋
to stop them you need surface to air missles just shoot them all down.
they cause global dimming.
this stops global warming.
http://en.wikipedia.org/wiki/global_dimming
2007-11-17 15:07:37
·
answer #8
·
answered by Anonymous
·
3⤊
0⤋
bestonne got it going on!
2007-11-16 00:14:48
·
answer #9
·
answered by jacquie 6
·
3⤊
1⤋