Maybe the chemtrails have more to do with weather control than anything else...
Weather control and law
 US and Canada agreement
In 1975, the US and Canada entered into an agreement under the auspices of the United Nations for the exchange of information on weather modification activity. [ 18 ]
 1977 UN Environmental Modification Convention
Main article: Environmental Modification Convention
Weather control, particularly hostile weather warfare, was addressed by the "United Nations General Assembly Resolution 31/72, TIAS 9614 Convention [ 19 ] on the Prohibition of Military or Any Other Hostile Use of Environmental Modification Techniques" was adopted. The Convention was: Signed in Geneva May 18, 1977; Entered into force October 5, 1978; Ratification by U.S. President December 13, 1979; U.S. ratification deposited at New York January 17, 1980. [ 20 ]
 US National Oceanic and Atmospheric Administration
In the US, the National Oceanic and Atmospheric Administration regulates weather control projects, under authority of Public Law 205 of the 92nd Congress.
 US Legislation
The Space Preservation Act was proposed "to preserve the cooperative, peaceful uses of space for the benefit of all humankind by permanently prohibiting the basing of weapons in space by the United States, and to require the President to take action to adopt and implement a world treaty banning space-based weapons." [ 21 ]
2005 U.S. Senate Bill 517 and U.S. House Bill 2995 U.S. Senate Bill 517 [ 22 ] and U.S. House Bill 2995 [ 23 ] were two bills proposed in 2005 that would have expanded experimental weather modification, to establish a Weather Modification Operations and Research Board, and implemented a national weather modification policy. Neither were made into law. Former Texas State SenatorJohn N. Leedom was the key lobbyist on behalf of the weather modification bills.
2007 U.S. Senate Bill 1807 & U.S. House Bill 3445 Senate Bill 1807 and House Bill 3445, identical bills introduced July 17, 2007, proposed to establish a Weather Mitigation Advisory and Research Board to fund weather modification research [ 24 ] [ 25 ]
 Cloud seeding for rain
Cloud seeding is a common technique to enhance precipitation. Evidence on its safety is strong, but there are still doubts about its effectiveness. Cloud seeding entails spraying small particles (like silver iodide) into the sky in order to trigger cloud formation. The hope is that the water vapor already in the air will condense onto the particles, forming clouds and eventually falling as rain. It is, of course, impossible to generate water through cloud seeding; cloud seeding only works to the extent that there is already water vapor present in the air. The principal goal is just to force precipitation to fall in one area instead of another. Critics generally contend that claimed successes occur in conditions which were going to rain anyway. It is used in a variety of drought-prone countries, including the United States, the People's Republic of China, India, and Russia. In the People's Republic of China there is a perceived dependency upon it in dry regions. In the United States, dry ice or silver iodide may be injected into a cloud by aircraft, or from the ground. In mountainous areas of the United States such as the Rocky Mountains and Sierra Nevada, [ 8 ] it has been employed for several decades.