Urinal Cakes: Why?

If you happen to be a frequenter of urinals, odds are you’ve seen one that has a little block at the bottom of it. But what does it do and why are you peeing on it?!

Hosted by: Michael Aranda
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Sources:
http://www.mayoclinic.org/symptoms/urine-odor/basics/causes/sym-20050704
http://gizmodo.com/why-you-really-shouldnt-snack-on-urinal-cakes-1748144472
http://www.rsc.org/chemistryworld/2014/05/naphthalene-mothball-podcast
http://www.atsdr.cdc.gov/phs/phs.asp?id=238&tid=43
https://rais.ornl.gov/tox/profiles/naphthalene_f_V1.html