Warning: Population Overload

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According to the UK's Institution of Mechanical Engineers, the world is hurtling towards population overload, putting billions of people at risk from hunger and thirst. And the global population is expected to keep growing with a predicted rise of 2.5 billion people by the end of the century. How will the planet and its citizens cope with this explosion?

Dr. Colin Brown director of engineering for the Institution of Mechanical Engineers explores the potential solutions to this inevitable problem.