Bundles of joy to come, so don't panic

When doctors bustled excitedly into her hospital ward to tell Anjana Arora that her newborn daughter was India's 1 billionth person, she was bewildered. "I didn't know what a billion was," she recalled.

That was in 2000, when the world population was a little over 6 billion. Yesterday it hit 7 billion, on the best guess of the UN, and is growing by about 200,000 a day.  Full Read