The Chinese culture lights off fireworks for everything from store openings to weddings to New Year’s celebrations.
The idea is that the loud noises scare away bad spirits.
In South America as well, every civil or religious holiday is punctuated by the constant snapping of firecrackers.
Firecrackers are generally made of cardboard or plastic, with black-powder as the propellant.
The key to loud firecrackers is pressure, which is achieved when the firecracker is very tightly packed.
