Sri Lanka celebrates 7 billion population milestone

01/03

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Sri lankan mother Danushika Perera cuddling her newly born baby at Castle hospital, as the world's population reaches 7 billion.

02/03

Caption

Sri lankan mother Danushika Perera cuddling her newly born baby at Castle hospital, as the world's population reaches 7 billion.

03/03

Caption

Sri lankan mother Danushika Perera cuddling her newly born baby at Castle hospital, as the world's population reaches 7 billion.

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Sri lankan mother Danushika Perera cuddled her newly born baby at Castle hospital. Colombo, Sri Lanka. 31st October, 2011.

Countries around the world marked the world's population reaching 7 billion Monday with lavish ceremonies for newborn infants symbolizing the milestone and warnings that there may be too many humans for the planet's resources. While demographers are unsure exactly when the world's population will reach the 7 billion mark, the U.N. is using Monday 31st October to symbolically mark the day