India is set to overtake China as the world's most populous nation by 2050, while some countries will shrink by nearly 40%, according to new research. The Population Reference Bureau (PRB) says the next half century will see wild swings in population sizes. It predicts that the number of people on Earth will reach 9.3bn by 2050, compared with 6.3bn today. Britain's population is likely to overtake that of France, while the US will grow by nearly 50%, it says.
overpopulation India China