What's a watershed?

How can a drop of oil hundreds of miles from the Mississippi River end up polluting it? It all comes down to our watershed. FMR's youth coordinator Kate Clayton and SuperVolunteer Astoria explain, with a little help from some food dye and cartoon bathtubs.

Next steps:
• Check out our 25 ways you can protect the river
• Become a River Guardian
• Join a volunteer restoration outing
• Protect our watershed by donating and becoming an FMR member

And big thanks to videographer Will Stock!