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According to UN estimates the Earth's seven-billionth inhabitant has just been born.

Two hundred years ago there were just one billion people - but population growth has accelerated very quickly.

In fact it has only taken a little more than a decade for us to go from six to seven billion.

Al Jazeera's Emma Hayward gets the perspective from a remarkable 12 year old in Bosnia who was the planet's sixth-billion person.

Source: Al Jazeera