Supersized Earth
IN this final episode Dallas Campbell examines what it takes to keep seven billion humans alive with food, energy and water.
To appreciate how we have transformed vast swaths of land to produce food, he paraglides over the south coast of Spain, where arid lands support the world’s largest greenhouse project.
He also helps herd more than 125,000 cattle on Brazil’s largest ranch and visits Lake Mead, the biggest man-made lake in the USA, to see how it has helped transform harsh desert into the bright lights of Las Vegas.