You've probably heard of tear gas before, but did you know that Mace is a form
of it? Learn more about the three commonly used types of tear gas -- how they
work and what they're used for -- in this podcast from HowStuffWorks.com.
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You've probably heard of tear gas before, but did you know that Mace is a form
of it? Learn more about the three commonly used types of tear gas -- how they
work and what they're used for -- in this podcast from HowStuffWorks.com.
Learn more about advertising on the HowStuffWorks podcasts at
[www.howstuffworks.com/advertisers.htm](http://www.howstuffworks.com/advertisers.htm)
And to learn about your ad choices when listening to podcasts, visit
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