From Fast­Com­pany: As the water crisis docu­men­tary Last Call at the Oasis opens, Partic­i­pant Media exec­u­tives Christo­pher Gebhardt and Chad Boettcher explain how they use social media to turn complex, over­whelming issues into hope and action. · Go to How to turn audi­ences into activists: 5 lessons in social engage­ment →