Is the firecracker salute really environmentally friendly and pollution-free?

Firecracker salute is a type of salute, because the sound is as consistent as the sound of traditional firecrackers, and the sound is exactly like the sound of firecrackers. Can produce the explosion sound and light effects of a real salute. But it will also cause pollution and is not environmentally friendly and pollution-free.

There are currently a variety of so-called "electronic salutes" on the market, which all use gasoline, liquefied gas or other flammable gases mixed with oxygen, and then use electronic ignition and explosion. This so-called "electronic salute" only uses electronic ignition, so it is nicknamed "electronic salute".

In fact, the professional names of this kind of cannon are oil cannon and air cannon. Like gunpowder cannons, this kind of cannon explodes through chemical reactions and requires the use of flammable and explosive materials such as gasoline, gas, hydrogen, and oxygen. It is not much safer than gunpowder cannons (some cities have been banned by the public security department). There are also concerns about Environmental pollution.