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PITTSBURGH (KDKA) – With commercial fireworks now legal in Pennsylvania, officials have issued warnings about using them on the Fourth of July.

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Pittsburgh Police Bomb Squad officers demonstrated the power of the higher-grade pyrotechnics Wednesday morning.

Last fall, state lawmaker passed a law allowing people to buy and use the full line of fireworks that follow federal guidelines.

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Doctors say they are expecting an increase in the number of emergency room visits because of fireworks.

“I think that there’s a false safety that people project when you say that a firework is legal. So, none of them are safe and certainly we wouldn’t want any children to be around them,” Dr. Jenny Ziembicki, of UPMC Mercy’s Burn Center, said.

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However, there is an additional 12 percent tax on fireworks. That money will go toward a fund for first responders.