Parched Lands: climate change or human activity?
Deserts are growing all over the world - with devastating results.
In this new 4-part series, Natasha Mitchell travels to some of the worst-affected areas in India, China, Australia and the US to report on why they have become so dry, and what is being done to reverse the process.
Is the problem due to human activity or a result of climate change? Should those whose way of life is in danger turn to technology or tradition for help?
Parched Lands is a BBC co-production with the Australian Broadcasting Corporation.
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