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originally posted by: IgorMartinez
a reply to: Xtrozero
I think you might be pushing the range a bit lower than typical, for commercial jets cruising. Typical range I’m reading is more like 33000 to 42000: a level which is above the weather system: a level where there is almost no humidity.
Anyway, all this debate about altitude may be a bit less than obvious. But I still think “chemtrails” are formed closer to the weather system, not far above it like commercial jets.
Presumably a commercial jet, say it is flying from Hawaii to New York, and passes over LA, shouldn’t it be leaving a trail? If you are in LA, that trail would be getting smaller going into the horizon, going east and west, until it becomes to small to see. But that’s not what you see with “chemtrails” which appear to be formed by planes patrolling over cities.
Contrails, which heighten the effect of global warming, may account for more than half (57%) of the entire climate impact of aviation.
Contrails are water vapour that condenses as ice onto soot particles emitted from aircraft engines. They don't always occur as it requires certain atmospheric conditions: the air must be very cold, humid and "supersaturated" for ice to form.
Dr Marc Stettler, transport and environment lecturer at Imperial College London, says changing the altitude of fewer than 2% of flights could potentially reduce contrail-linked climate change by a staggering 59%. "Tweaking the flight elevation by just a thousand feet can stop some contrails from forming," he explains.
Meanwhile atmospheric scientist Prof Ken Caldiera, from the Carnegie Institution for Science, makes a compelling case. He estimates preventing most of the damaging climate impact of contrails would cost less than $1bn (£720m) a year and the net value of the benefit could be more than a thousand times that.
"We know of no comparable climate investment with a similarly high likelihood of success," he wrote in the scientific journal Nature.
originally posted by: NeighborhoodWatch
The government has knowingly exposed the population to harmful chemicals and agents in the past, some of which were administered via spraying operations. Whose to say that they aren't still doing it?
originally posted by: Zaphod58
The geoengineering tests are planned higher than aircraft fly, and the bio tests were all lower than planes normally fly now. There have been no confirmed links to anything being sprayed by the planes flying overhead every day.
originally posted by: Zaphod58
a reply to: underpass61
Contrails are just clouds. If there’s enough humidity in the air they linger and even spread out and become cloud cover. You can even predict the weather watching contrails sometimes.
originally posted by: Zaphod58
a reply to: FarmerSimulation
Mexico outlawing chemtrails doesn’t stop contrails from crossing the border. Even if they were real, they aren’t going to magically stop at the border. And what you are seeing isn’t geoengineering, it’s persistent contrails being created ahead of a weather front. And yes you can predict the weather somewhat from them.
originally posted by: Zaphod58
a reply to: FarmerSimulation
The Air Force made no such claim though. The paper you refer to was a War College what if paper. IF the technology existed, how could we use it.
Of course the planes are creating man made clouds. I never said they were not. But contrails aren’t geoengineering. As for crossing, there are thousands of planes in the sky at any given time, so of course they’re going to cross.