Original air date: 23 February 1984
Below there is a more detailed look at the timeline
Introducing next episode:
“…And the grass, too, will spring again, this remarkable plant that can survive intense grazing and burning and flooding. The one thing it can’t tolerate is drought. If there is just a little less rain, then its leaves wither, its roots shrivel and can no longer hold the soil together, so that the wind can catch it and blow away the small nutritious particles. And then it’s reduced to little more than sand and the land becomes a desert. And it’s to deserts that we’re going in the next programme.”