The materials used are potassium chloride, sodium chloride, magnesium, and other materials. The United Arab Emirates has been cloud seeding since the 2000s and aims to increase rainfall by 15-30% per year. In mountainous areas of the United States such as the Rocky Mountains and Sierra Nevada, cloud seeding has been employed since the 1950s. In China there is a perceived dependency upon it in dry regions, and there is a strong suspicion it is used to 'wash the air' in dry and heavily polluted places, such as Beijing. It is used in a variety of drought-prone countries, including the United States, China, India, and Russia. Critics generally contend that claimed successes occur in conditions which were going to lead to rain anyway. Cloud seeding only works to the extent that there is already water vapor present in the air. Cloud seeding entails spraying small particles, such as silver iodide, onto clouds to attempt to affect their development, usually with the goal of increasing precipitation. Cloud seeding Д¬loud seeding is a common technique to enhance precipitation. The artificial rainstorms were said to have sometimes caused hail, gales and thunderstorms, baffling local residents.

In January 2011, several newspapers and magazines, including the UK's Sunday Times and Arabian Business, reported that scientists backed by the government of Abu Dhabi, the capital of the United Arab Emirates, had created over 50 artificial rainstorms between July and August 2010 near Al Ain, a city which lies close to the country's border with Oman and is the second-largest city in the Abu Dhabi Emirate. In 1971, the government established the Artificial Rainmaking Research and Development Project within the Thai Ministry of Agriculture and Cooperatives Dry ice flakes were scattered over clouds. The royal rainmaking project debuted on 20 July 1969 at his behest, when the first rainmaking attempt was made at Khao Yai National Park. Thai farmers were not able to grow crops for lack of water.

Over 82 percent of Thai agricultural land relied on rainfall. He discovered that many areas faced the problem of drought. In November 1954 the Thailand Royal Rainmaking Project (Thai: а№‚аё„аёЈаё‡аёЃаёІаёЈаёќаё™аё«аёҐаё§аё‡) was initiated by the King Bhumibol Adulyadej. Wilhelm Reich performed cloudbusting experiments in the 1950s, the results of which are controversial and not widely accepted by mainstream science. The results of the test, supervised by Robert Dyrenforth, were inconclusive. After their stories were collected in War and Weather, the United States Department of War in the late 19th century purchased $9,000 of gunpowder and explosives to detonate them in Texas, in hopes of condensing water vapor into rain. Veterans of the Seven Years' War, Napoleonic wars, and the American Civil War reported that rain fell after every large battle.

6.3 US National Oceanic and Atmospheric AdministrationДЄ popular belief in Northern Europe that shooting prevents hail caused many agricultural towns to fire cannons without ammunition.

6.2 1977 UN Environmental Modification Convention.

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