We have a few fascinating fireworks facts for your Fourth of July picnics!

Over the last few decades, states and counties across the U.S. have liberalized fireworks laws. It's just one reason why sales of backyard pyrotechnics have exploded. So what happened to safety over this period?

Music by Drop Electric. Find us: Facebook / Newsletter.

Subscribe to our show on Apple Podcasts, Spotify, Pocket Casts and NPR One.

For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org.

Disclaimer: The copyright of this article belongs to the original author. Reposting this article is solely for the purpose of information dissemination and does not constitute any investment advice. If there is any infringement, please contact us immediately. We will make corrections or deletions as necessary. Thank you.