I liked this piece. I think a lot about negative externalities, it's
nice to flip the script once in a while to think about positive
externalities as well.
http://boingboing.net/2013/01/08/positive-externalities-thrive.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+boingboing%2FiBag+%28Boing+Boing%29
Typos courtesy of my iPhone
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