World's 7 billionth baby -- is this something to celebrate or to mourn?

On an already overcrowded planet, we are now--or soon will be--7 billion strong (weak).... Paul Ehrlich's warnings in his book The Population Explosion have gone unheeded.

World, meet your 7 billionth member. The United Nations has symbolically chosen a Filipina baby, Danica May Camacho, to mark the population milestone. Danica was born just before midnight Sunday, weighing 5.5 pounds. Some groups have disputed whether or not the world population has hit the 7 billion mark, arguing that it is instead more likely to be crossed next year. Nevertheless, the U.N. named Oct. 31 “Seven Billion Day” as a way to highlight the challenges of the world’s growing population.