'The Lake' Courtesy of Abby Ellis EXCLUSIVE: Appian Way principals Leonardo DiCaprio, Jennifer Davisson, and Phillip Watson have signed on to executive produce The Lake ahead of the documentary's world premiere at the Sundance Film Festival. The film directed by Abby Ellis (Flint's Deadly Water) investigates "a looming environmental nuclear bomb" in the festival's backyard: "Beneath the drying lakebed of Great Salt Lake lies a toxic reservoir of heavy metals - arsenic, lead, mercury, and more - poised to become airborne, endangering the millions of people living in the metropolitan region of U...