Published on Global Research.ca, by Washington’s Blog, January 5, 2011.
Weather modification is a well-known endeavor. For example, governments have been seeding clouds for decades to create more rain. And during warfare to create mud to slow the enemy’s ability to use roads. As the Guardian reported in 2001:
- During the Vietnam war, the Americans launched Project Popeye, a secret mission to seed the tops of monsoon clouds and trigger phenomenal downpours that would wash away the Ho Chi Minh Trail used for ferrying supplies.
- For five years Vietnam, Cambodia and Laos were sprayed during the monsoons, and military intelligence claimed that rainfall was increased by a third in some places. It only came to an end in March 1971 when [Washington Post] journalist Jack Anderson exposed the project and caused such a public furor that the UN general assembly approved a universal treaty banning environmental warfare.
- But the US air force planners recently came up with new proposals to launch new weather weapons. Instead of silver-iodide, the idea is to shower fine particles of heat-absorbing carbon over clouds to trigger localised flooding and bog down troops and their equipment. Lasers on aircraft would also trigger lightning onto enemy aircraft, whilst other lasers could be fired at fog to clear a path over enemy targets on the ground … //
… Persistent line-shaped contrails are estimated to cover, on average, about 0.1 percent of the Earth’s surface …
It is clear that persistent jet contrails can affect weather and climate. I have no idea whether persistent jet contrails are an unintentional affect of airplanes interacting with the environment, or an intentional attempt to affect the weather.
The articles quoted in the first part of this essay provide support for the possibility that at least some of the affects might be intentional. And as a 2008 international workshop on weather modification noted:
It has been well established that successful implementation of Cloud Seeding resulting in precipitation enhancement has significant positive beneficial impact in managing the issue of global warming and climate change.
German television network RTL purportedly alleges that the German government has admitted testing persistent jet contrails for military purposes – as a high-tech form of “chaff” to disrupt enemy radar.
The EPA attributes formation of persistent jet contrails to altitude and humidity, as well as trace impurities such as sulfur contained in jet fuel. On the other hand, some claim that very high concentrations of chemicals like barium and sulfur have been found in groundwater after the incidence of persistent jet contrails increased. And see this.
But whether or not persistent jet contrails are intentionally being created to affect climate or for military purposes or are an unintentional byproduct of flying a modern airplane is beyond the scope of this essay. (full huge long text).