Changes

The '''Chemtrails''' [[conspiracy theory]] claims that some [[contrails]], visible in the Earth's atmosphere, are biological or chemical agents, sprayed at high altitudes for reasons unknown to the public. There are many versions of the theory that propose different explanations, similar to how [[urban legends]] are spread.

The '''Chemtrails''' [[conspiracy theory]] claims that some [[contrails]], visible in the Earth's atmosphere, are biological or chemical agents, sprayed at high altitudes for reasons unknown to the public. There are many versions of the theory that propose different explanations, similar to how [[urban legend]]s are spread.

The conspiracy theory, however, has never found any credit in the scientific community, as it is devoid of objective evidence. What advocates of the theory identify as "chemtrails" are normal condensation trails (contrails), which under certain weather conditions take an unusual appearance.

The conspiracy theory, however, has never found any credit in the scientific community, as it is devoid of objective evidence. What advocates of the theory identify as "chemtrails" are normal condensation trails (contrails), which under certain weather conditions take an unusual appearance.

The spread of this conspiracy theory throughout the world, via mass media and especially via the Internet, has led to government agencies receiving thousands of complaints from people who demand explanations for these alleged activities.

The spread of this conspiracy theory throughout the world, via mass media and especially via the Internet, has led to government agencies receiving thousands of complaints from people who demand explanations for these alleged activities.

The same government agencies and scientists have repeatedly denied the existence of chemical trails.

The same government agencies and scientists have repeatedly denied the existence of chemical trails.

The [[United States Air Force|US Air Force]] has argued that the theory is a hoax, a view which is recognized by many universities, scientific organizations, and the [[mainstream media]]. The Department for Environment, Food and Rural Affairs (a British regulatory agency) stressed that the "chemical trails" theory is unscientific. A Canadian parliamentary leader said that "chemical trails" is just a popular expression and that there is no evidence supporting their existence. Similar responses were given by various Italian governmental figures as well as by pilots and weather experts. Magazines and programs have established this scientific theory as a hoax.

The [[United States Air Force|US Air Force]] has argued that the theory is a hoax, a view which is recognized by many [[universities]] , [[scientific]] organizations, and the [[mainstream media]]. The Department for Environment, Food and Rural Affairs (a [[British]] regulatory agency) stressed that the "chemical trails" theory is unscientific. A [[Canadian]] parliamentary leader said that "chemical trails" is just a popular expression and that there is no evidence supporting their existence. Similar responses were given by various Italian governmental figures as well as by pilots and weather experts. Magazines and programs have established this scientific theory as a hoax.

==Cloud seeding==

==Cloud seeding==

[[Category:Science]]

[[Category:Science]]