What fireworks go up in the air?
Afireworks consists essentially of black powder as a consisting of , of and saltpetre, and an (most often of perchlorate ).
There are alsometallic that give their bright to fireworks. Blue comes, for example, from , red from or , and bright green or white from .
Fireworks more polluting than car traffic
During its explosion, the bomb releases millions ofinto the that generate significant pollution, much higher than that due to traffic .
In 2012, Airparif analyzed the concentration of fine particles in thefollowing the show in the capital and observed an increase of more than 3,000% in the firing zone.
The level then drops quickly to normal, but at the national level, the concentration of fine particles is still 42% higher during the 24 hours after a fireworks, according to a study on the national holiday of July 4 in the United States and published in.
In the United Kingdom, fireworks are today the largest source of production of certain metallic particles in the atmosphere.
These fine particles are at the origin of well-documented health problems: respiratory diseases, increased risks for asthmatics and, etc.
Theof the causes a significant release of CO 2 .
A fireworks display, such as that of 14 July, with 30 tons of powder, projects 14.7 tons of CO 2 into the atmosphere , the equivalent of a journey of 67,000 km by petrol car.
Pollution of soils and rivers
When they fall back on the ground, the dust will also pollute the environment. The(a propellant) and unburned contaminate soil and rivers.
Copper, for example, is likely to cause high levels ofand skin problems; the causes of lakes and may have harmful effects on the heart and intestine.
Water bodies near seaside resorts and amusement parks, where fireworks are common, are experiencing recurring problems with water quality.
Finally, there is “visible” pollution: the cardboard and paper residues that litter the ground after firing and are not always collected.
The eco-friendly alternatives to fireworks
In recent years, however, fireworks have attempted to reduce the environmental impact of fireworks.
Modern fireworks now use compressed air to propel pyrotechnic devices and perchlorates can be replaced by nitrogen compounds such as tetrazole or bistetrazole.
But we could especially substitute fireworks with sound and, or even , for equally breathtaking shows.