In some countries like Germany, it's not New Year's Eve without a night sky full of fireworks. But how bad are these colorful explosions for our environment? And what are the health effects?
Starting a new year can be costly. Germans, for instance, send €100 to 200 million ($240 million) up in smoke every New Year's Eve, as spectacular fireworks displays light up the sky above villages and cities across the country.
But the annual tradition also has an environmental cost, with each rocket releasing a toxic mix of chemicals and particulates into the air.