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Fireworks can be dangerous. Because of that, laws had to be made which would regulate use of fireworks and lessen the damage they can do. For a law to function, classes of the fireworks had to be made. Read about different types of fireworks.
Production of fireworks can be a dangerous job and that is way a special precautions are used. Most of the job is done by hands, special materials are used that will not produce sparks and workers are very cautious.