How is dust useful to us?
2] HOW IS DUST USEFUL TO US? Many of us believe that dust is harmful to us but this is only one side of the picture.Dust is also useful to us. But before we go through the uses of dust, let us find out what dust is, and how it is formed. Every solid substance is composed of very small particles. When a substance disintegrates, its small particles scatter and they form dust particles.For example, if we break a brick into small pieces, it produces small particles in the form of dust. There are a number of ways by which dust is formed. Smokegenerated by the burning of coal, wood,petrol, etc. also produces dust. Dead plant and animal matter, sea salt, desert sand, volcanic ash, etc. also produce dust particles. These dust particles mix with air, which are carried from one place to another.Thus, particles from the Earth's surface fly in the air in the form of dust. Did you know that dust helps in rainfall? The water vapour in the clouds conde...
