Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has partnered with CNN to drive awareness and education around key sustainability issues and to inspire positive action. CNN  —  Tree-covered mountains rise behind a pile of trash, children run through the orange haze of a dust storm, and a billboard standing on parched earth indicates where the seashore

Tag-uri: Billboard