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Artificial clouds are made for artificial rain, which are used by cooling chemicals such as silver iodide and dry ice, which have artificial rainfall.

What is artificial rain?
Artificial rain is the process of creating clouds and then making them rain-fed through man-made activities. Artificial rain is also called cloud-seeding. The first performance of cloud-seeding was done by General Electric Lab in Bathurst, Australia in February 1947.
Normally rains happen when the heat of the sun gets warm by the heat of the sun and it rises upwards, the pressure of the air arising above is reduced and after reaching one height in the sky, it cools down. When more concentration in this air increases, the rain droplets become so big that they can no longer hang in the air for longer periods, they start falling down in the form of rain. This is called normal rain. But in these artificial rain, such situations are created by humans.

How do artificial rain is made?
Artificial rainfall means a special process to bring artificial changes in the physical state of the clouds, which makes the environment conducive to rain. This process of cloud change is called cloud seeding.
The procedure for making artificial precipitation is completed in three phases.
First stage:
By using chemicals in the first stage, the mass of the air is sent upward above the desired terrain so that they can make clouds of rain. In this process, compounds of calcium chloride, calcium carbide, calcium oxide, salt and urea and compounds of urea and ammonium nitrate are used. These compounds absorb water vapor from the air and start the process of condensation.
Second step:
At this stage the mass of the clouds is increased using salt, urea, ammonium nitrate, dry ice and calcium chloride.
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third step:
The first two steps mentioned above are linked to the construction of rain clouds. The process of the third phase is done when either the clouds are already made or made by humans. At this stage, cooling chemicals like silver iodide and dry ice are sprayed in the clouds, this increases the density of the clouds and the whole clouds turn into ice crystals and when they become so heavy And for some time the sky can not remain hung and then it rains in the form of rain. Airplanes, explosive rockets or balloons are used to implant Silver Iodide in prescribed clouds. This technique was developed in 1945 and today it is being used in almost 40 countries. This process is used most for making artificial rainfall.

How are chemicals in the clouds sprinkled?
Generally the help of the aircraft is taken to do cloud-seeding through air. In the aircraft, Silver iodide has two burners or generators, in which the silver iodide solution is filled with high pressure. In the targeted area the aircraft is run in the opposite direction of the air so that the slurry is spread over the area. Burners are turned on as soon as the aircraft is near the desired (expected) cloud.

It is important to mention here that if the clouds are already present in the sky, then it can be done directly by adopting the process of third phase (sprinkling silver iodide and dry ice). In the area where rain is to be performed, the clouds are sent to the cedar when the clouds appear on the radar so that the clouds do not grow further due to the winds.
Although artificial precipitation is a costly and prolonged process, but some countries have increased its technology so much that their costs have been reduced so that in the United States, one tonne rain water costs 1.3 cents. Whereas in Australia this is just a decimal 3, which is quite cheap. China has also achieved great efficiency in making artificial rain.
So we saw how man has challenged the rules made by nature. Now man has succeeded in creating artificial heart, artificial blood, from artificial rain. But every development has its own limit, which is why some scientists believe that chemicals used in artificial rain techniques can pollute water and soil which can be dangerous for future generations.

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