Are the fireworks in the Winter Olympics polluted?

Beijing Olympic Games adopted a large number of environmentally-friendly fireworks technologies. Such as document 200520020828. X relates to a pollution-free and safe fireworks, which consists of a paper shell, a muddy upper back cover and a muddy lower back cover to form a closed cavity filled with chemical powder mixture.

A miniature ignition head is buried in the powder mixture, and its electrode leads are connected with two electrodes at one end of the torch body. The micro ignition head is provided with an electrode lead connected with the electrode and an electric heating wire which generates local high temperature after being electrified. Chemical drugs are wrapped around the heating wire, and nitrocellulose is wrapped outside the drug.

There are three waves of fireworks in the Winter Olympics.

The first wave, with beginning of spring as the theme, shows the beautiful meaning of traditional solar terms in China. After the second wave was officially opened, a wave of fireworks was magnificent, and the fire trees and silver flowers were flourishing. After the third wave of the main torch was lit, the dazzling Olympic rings shone in the sky. "The whole fireworks show is divided into three waves. The design combines the creative concept of the opening ceremony of the Winter Olympics, which is simple, safe and wonderful.