In her calling as an advocate for water conservation, Alexandra Cousteau has joined the family business. Her late grandfather, Jacques-Yves Cousteau, was the innovative explorer-filmmaker who introduced landlocked viewers to the undersea world. Her father, Phillippe, continued Jacques's mission until his tragic death in a 1979 plane crash.
Now, Alexandra—along with her brother, Phillippe Jr., and cousin Fabien
—is part of the third generation of Cousteaus fighting to protect our oceans and rivers. And at 33, Alexandra is a prolific advocate. Among other projects, she has founded Blue Legacy International, which explores human interactions with water; has been honored by the National Geographic Society and the United Nations; is on the board of directors of the Mother Nature Network; co-hosted the Discovery Channel's Blue August
; was the global water adviser for LiveEarth 2010's Run for Water; and will publish her first book, This Blue Planet
, in 2011.