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

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

What do those diamond-shaped signs on buildings mean?

Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and explain -- the everyday science in the world around us.

Share What do those diamond-shaped signs on buildings mean?

Sign up to save your podcasts

What do those diamond-shaped signs on buildings mean?

What do those diamond-shaped signs on buildings mean?