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	Podcast:		BrainStuff
	Episode:		What do those diamond-shaped signs on buildings mean?
	Category:		Science & Medicine
	Duration:		00:03:16
	Publish Date:		2014-07-09 20:08:31
	Description:		The National Fire Protection Agency, or NFPA, uses these signs to indicate hazardous materials stored in an unknown building. Listen in to learn how the signs work -- and how they help firefighters -- in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.
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