South African explorer Steve Boyes embarks on a mission to map and record scientific baselines across all the major inland river basins of Africa, including the Chambeshi River. CNN is committed to reporting on the environmental challenges facing our planet, together with the solutions. Through Call to Earth and in partnership with Rolex as part of their Perpetual Planet Initiative, we will champion extraordinary people and projects, helping to create a more sustainable future. Our goal is to drive awareness, action and education around key issues, inspiring a blueprint for a more environmentally conscious life. United States 2024.