WHO IS THAT MASKED MAN??
HE'S THE HAZMAT GUY!
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When they break up the stuff and get rid of it, they don't want to get sick either. So they wear masks that filter out any dust. They also wear suits so they don't get any of it on their clothes. Goggles and gloves keep their eyes and hands protected. And everyone must always wear a hard hat on the construction site, of course!
Once the hazmat crew is finished, an inspector comes to make sure the area is truly free of dangerous materials. Another step finished on the way to demolition.