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Colin Brazier is a Catholic and with six children, has long promoted the benefits of a large family. Colin looks at this very personal issue and examines what part religion plays in how many children makes a family\\n \\nThe idea of religious people being told that re-populating the earth is part of their faith is a strong one - but environmentalists foresee problems for the planet if the population grows as it is doing, especially in parts of the world where religious teachings are very influential.

Colin meets a Jewish family who have chosen to have a large family and a Christian who has decided that she would have just one child for the sake of the environment

Presenter: Colin Brazier\\nProducer: Henrietta Harrison\\nImage: Getty Images