That is why acid rain occurs when the air is polluted. The air contains oxygen so people recommend the rain to be consumable as it has lots of oxygen contents in them. But distilled water does not contain any minerals in them, so it is not recommended for consumption because of lack of minerals.

**Distilled Water**

Rainwater is a type of distilled water. Distilled water is water that has been purified through a process called distillation. Distillation involves heating water to create steam, which is then condensed and collected as the purified water. This process removes impurities, such as minerals, chemicals, and pollutants, leaving behind pure water.

**Explanation:**

**1. Saline water:**
Saline water is water that contains a high concentration of dissolved salts. Rainwater, on the other hand, does not contain a significant amount of salt. It is formed through the process of evaporation, condensation, and precipitation, which does not involve the accumulation of salts. Therefore, rainwater is not saline water.

**2. Distilled water:**
As mentioned earlier, rainwater is a type of distilled water. When water evaporates from the Earth's surface, it leaves behind impurities such as minerals, chemicals, and pollutants. These impurities do not evaporate along with the water. When the water vapor condenses in the atmosphere and forms clouds, it becomes pure water without the impurities. This pure water then falls as rain, making it a form of distilled water.

**3. Carbonated water:**
Carbonated water is water that has been infused with carbon dioxide gas, resulting in the formation of carbonic acid. This process creates bubbles and gives the water a fizzy or sparkling texture. Rainwater does not naturally contain carbon dioxide gas, and therefore, it is not carbonated water.

**4. Saturated water:**
Saturated water refers to water that is holding the maximum amount of dissolved substances or solutes that it can hold at a given temperature and pressure. Rainwater does not typically contain a high concentration of dissolved substances. It is formed from the condensation of water vapor in the atmosphere, which does not involve the saturation of water with solutes. Therefore, rainwater is not saturated water.

In conclusion, rainwater is a type of distilled water because it is formed through the process of evaporation, condensation, and precipitation, which removes impurities and leaves behind pure water.

Rain water came direct from the cloud. It has all the nutrients minerals and vitamins present in it and is pure to drink. It does not has any germs present in it.