If you're an American, you've probably spent many a 4th of July holiday watching an elaborate fireworks display in the night sky. While fireworks sure are fun to watch, those large bursts of color are composed of several different heavy metals that explode and release tiny dangerous particles into the atmosphere. Aren't there safer ways to show our patriotism? Learn all about what fireworks are made of, how those metals affect our atmosphere and health, and how to celebrate responsibly instead.

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