http://www.wnyc.org/story/using-your-personal-data-change-world/ This is from the author of Hacking Happiness: Why your Personal Data Counts and how tracking it can change the world
http://www.wnyc.org/story/using-your-personal-data-change-world/ This is from the author of Hacking Happiness: Why your Personal Data Counts and how tracking it can change the world