Fireworks paint the skyline at the Chinese Lunar New Year Eve over Changsha, capital of central China's Hunan Province, on Feb 9, 2013. [Photo/Xinhua]

THE GREEN WAY OUT

Under the pressure of environmental concerns, producers are working to develop more environmentally-friendly fireworks.

The alternative products are mostly made with improved black powder and new chemicals, which contain less heavy metal and sulphur, reducing emission of harmful sulfide.

According to Panda Fireworks, the company developed sulfide-free fireworks last year, which now account for 70 percent of the products prepared for sale this Spring Festival.

Now, 70 to 80 percent of Lidu's production are environmentally friendly, Hou said.

Green fireworks, however, are still too new, with high research and development costs pushing up the retail price.

According to Wang Sheng, a firework store owner, the price of one box of sulfide-free green fireworks is about 600 yuan ($95.9), 10 to 15 percent higher than normal fireworks.

In China' Henan Province, an inventor has created a new kind of firecracker that uses no explosives.

Producing an explosive sound by releasing compressed air from a closed cavity, his fireworks cost around 150 yuan per unit, ten times the price of traditional firecrackers.

The price of green products will hopefully drop as market demand and production expand.

Chen Jian, a political advisor in Jiangxi Province, said local governments should take measures to help the firework companies research and develop environmentally-friendly products.

Rao Hui, chief engineer of the environment monitoring station of Nanchang City, said green fireworks can both satisfy the needs of environmental protection and reservation of traditional customs.

Authorities should help strengthen the market demand for green fireworks by heightening public awareness of the merits of the products, he said.