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It's all very well saying that it's up to the parents etc Bestmum but the fact of the matter is, this planet can no longer sustain over population on a scale such as this so people will not have the choice for much longer! There is not enough food on the planet for 7 billion people (incidentally, do you have any idea how much we in the west rely on the rest of the planet to survive). There is not enough fresh water for 7 billion people and fossil fuels have now peaked.