Did you see this article? http://news.xinhuanet.com/english/2016-09/16/c_135690655.htm

It includes:

/An Sinh Xanh Science and Technology Company in the central city of Da Nang has proposed the Vietnamese government allocate 5,000 billion Vietnamese dong (224 million U.S. dollars) to the local firm so that it can buy vessels and aircraft to actively make rain to deal with drought or prevent flooding, daily newspaper Tien Phong (Pioneer) reported on Friday.//
//The firm's general director Phan Dinh Phuong said that vessels will pump seawater to pipes fixed at the height of some 5 km by helicopters or balloons.
//The local firm, which has produced many safety and energy-saving equipment, believed that the project will be 100 percent successful, because relevant principles of physics and chemistry have been applied successfully to eject water jets at Rong Bridge in Da Nang./

Even if they don't make rain, can we learn from them how hard it is to spray into the atmosphere from a height of 5 km with pipes?


Alan Robock, Distinguished Professor
  Editor, Reviews of Geophysics
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