Smoke from Fireworks is Harmful to Health (IMAGE) Spanish Foundation for Science and Technology Caption The metallic particles in the smoke emitted by fireworks pose a health risk, particularly to people who suffer from asthma. Credit Jorge Alejo Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.