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How many people are too many? Discover the population capacity of our planet...
How will we cope with a global food shortage?
What is life like in one of Brazil's biggest slums?
Discover the voluntary and compulsory measures used to tackle India's growing population.
What are the problems of an ageing population? And what can be done to tackle it?
What is life like in one of the most densely populated cities in the world?
What effects could climate change have on populations around the world?