The U.N. Weather Warfare Treaty......What is it

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Cloud seeding has been mentioned over and over.
  But what exactly is cloud seeding and how does it work?
           
   Cloud seeding:

Cloud seeding, a form of weather modification, is the attempt to change the amount or type of precipitation that falls from clouds, by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud. The usual intent is to increase precipitation (rain or snow), but hail and fog suppression are also widely practiced in airports.

Cloud seeding also occurs due to ice nucleators in nature, most of which are bacterial in origin.[2]

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Cloud seeding experimentation has been going on for decades, going back to 30's-40's.
The U.S. Military used it during the Vietnam war, it was called Operation Popeye


Operation Popeye:

Operation Popeye (Project Controlled Weather Popeye/Motorpool/Intermediary-Compatriot) was a highly classified weather modification program in Southeast Asia during 1967–1972. The cloud seeding operation during the Vietnam War ran from March 20, 1967 until July 5, 1972 in an attempt to extend the monsoon season, specifically over areas of the Ho Chi Minh Trail. The operation was used to induce rain and extend the East Asian Monsoon season in support of U.S. government efforts related to the War in Southeast Asia.

The operation seeded clouds with both silver iodide and lead iodide, resulting in the targeted areas seeing an extension of the monsoon period by an average of 30 to 45 days. As the continuous rainfall slowed down the truck traffic, it was considered relatively successful.[1] However, resultant rain and subsequent flooding of the nearby Song Con River is sometimes blamed for the move of POWs from the prison camp at Son Tay and, therefore, the failure of Operation Ivory Coast.[2]

The former U.S. Secretary of Defense, Robert S. McNamara, was aware that there might be objections raised by the international scientific community but said in a memo to the president that such objections had not in the past been a basis for prevention of military activities considered to be in the interests of U.S. national security.

The chemical weather modification program was conducted from Thailand over Cambodia, Laos, and Vietnam and allegedly sponsored by Secretary of State Henry Kissinger and CIA without the authorization of then Secretary of Defense Melvin Laird who had categorically denied to Congress that a program for modification of the weather for use as a tactical weapon even existed.[3]

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How does cloud seeding work?

The most common chemicals used for cloud seeding include silver iodide, potassium iodide and dry ice (solid carbon dioxide). Liquid propane, which expands into a gas, has also been used. This can produce ice crystals at higher temperatures than silver iodide. After promising research, the use of hygroscopic materials, such as table salt, is becoming more popular.[3] Cloud seeding to increase snowfall takes place when temperatures within the clouds are between 19 and −4 °F (−7 and −20 °C).[4] Introduction of a substance such as silver iodide, which has a crystalline structure similar to that of ice, will induce freezing nucleation.

In mid-latitude clouds, the usual seeding strategy has been based on the fact that the equilibrium vapor pressure is lower over ice than over water. The formation of ice particles in super cooled clouds allows those particles to grow at the expense of liquid droplets. If sufficient growth takes place, the particles become heavy enough to fall as precipitation from clouds that otherwise would produce no precipitation. This process is known as "static" seeding.

Seeding of warm-season or tropical cumulonimbus (convective) clouds seeks to exploit the latent heat released by freezing. This strategy of "dynamic" seeding assumes that the additional latent heat adds buoyancy, strengthens updrafts, ensures more low-level convergence, and ultimately causes rapid growth of properly selected clouds.

Cloud seeding chemicals may be dispersed by aircraft or by dispersion devices located on the ground (generators or canisters fired from anti-aircraft guns or rockets). For release by aircraft, silver iodide flares are ignited and dispersed as an aircraft flies through the inflow of a cloud. When released by devices on the ground, the fine particles are carried downwind and upward by air currents after release.
An electronic mechanism was tested in 2010, when infrared laser pulses were directed to the air above Berlin by researchers from the University of Geneva.[5] The experimenters posited that the pulses would encourage atmospheric sulfur dioxide and nitrogen dioxide to form particles that would then act as seeds.[5]

Cloud seeding is no longer considered a fringe science, and is considered a mainstream tool to improve rain precipitation and snow. New technology and research has produced reliable results that make cloud seeding a dependable and affordable water-supply practice for many regions.[6] While practiced widely around the world, the effectiveness of cloud seeding is still a matter of academic debate. In 2004 the United States National Research Council released a report stating that to date, there is still no convincing scientific proof of the efficacy of intentional weather modification as it only has 30 percent or less chance of success.[7]

Cloud seeding has been shown to be effective in altering cloud structure and size and in converting supercooled liquid water to ice particles. The amount of precipitation due to seeding is difficult to quantify.