We were shown this video last night in my algorithm design class (long story). It is 20 minutes long and uses Flash so you'll need the plugin installed.

While I don't wholeheartedly agree with everything, it should still give you pause and make you at least consider what is going on around you.

Be warned that there is some "anti-commercialism"/"anti-government"/"agendizing" in it, but the overall message is pretty good.

http://www.storyofstuff.com/